Topology from the materials perspective
|
|
|
- Magnus Owen
- 5 years ago
- Views:
Transcription
1 Topology from the materials perspective p Special thanks to Binghai Yan, Shekhar Chandra, Lukas Müchler, Leslie Schoop, StasChadov Chadov, SunYan, YulinChen Chen, ShouchengZhang Zhang, StuartParkin Claudia FELSER
2 Co-workers in Dresden and elsewhere Andrei Bernevig, Princeton, CNR Rao, Bangalore, India Uli Zeitler, et al. HFML EMFL, Nijmegen; J. Wosnitza et al., HFML Rossendorf Yulin Chen et al., Oxford; Günter Reiss, Bielfeld S.C.Zhang et al. and A. Kapitulnik, Stanford S. S. P. Parkin et al., IBM Almaden, MPI Halle
3 Topological Insulators
4 Topology
5 Topology in chemistry Molecules with different chiralities can have different physical and chemical properties Topologically interesting compounds are 4n aromatics with Möbius geometry, whereas normal 4n compounds are anti aromatic
6 Universe particles condensed matter Theoretician from model to materials predictions
7 Family of quantum Hall effects 1985 Klaus von Klitzing 1998 Horst Ludwig Störmer and Daniel Tsui 2010 Andre Geim and Konstantin Novoselov S Oh Science 340 (2013) David Thouless, Duncan Haldane und Michael Kosterlitz
8
9 Trivial and topological insulators Trivial semiconductor CdS Topological Insulator Without spin orbit coupling Topological Insulator Withspin orbit coupling
10 Topological insulator First prediction in graphene by Kane Kane and Mele, PRL 95, (2005) Bernevig, et al., Science Si 314, 1757 (2006) Bernevig, S.C. Zhang, PRL 96, (2006) König, et al. Science 318, 766 (2007)
11 First success D: Dirac cone on the surface 2D: Dirac cone in quantum well
12 3DTopological Insulators Bi Sb alloys Bi 2 Se 3 and relatives Theory and experiment Moore and Balents, PRB 75, (R) (2007) Fu and Kane, PRB 76, (2007) Murakami, New J. Phys. 9, 356 (2007) Hsieh, et al., Science 323, 919 (2009) Xia, et al., Nature Phys. 5, 398 (2009); Zhang, et al., Nature Phys. 5, 438 (2009)
13 Impossible d'afficher l'image. Votre ordinateur manque peut-être de mémoire pour ouvrir l'image ou l'image est endommagée. Redémarrez l'ordinateur, puis ouvrez à nouveau le fichier. Si le x rouge est toujours affiché, vous devrez peut-être supprimer l'image avant de la réinsérer. Materials Claudia Felser and Xiao Liang Qi, Guest Editors, MRS Bull. 39 (2014) 843. Tl +1 Sn 2+ Bi +3 Inert pair effect
14 Binghai Yan at al., Nature Communication 6 (2015) Rewriting the text book: Au
15 Rewriting the text book: Au Binghai Yan at al., Nature Communication 6 (2015) Cs + Au
16 Heusler compounds Diamond ZnS Heusler XYZ C1 b X 2 YZ L2 1 Graf T, Felser C, Parkin SSP, IEEE TRANSACTIONS ON MAGNETICS 47 (2011) 367 Graf T, Felser C, Parkin SSP, Progress in Solid State Chemistry Chemistry 39 (2011) 1
17 Predicting new compounds LaPtBi S. Chadov et al., Nat. Mater. 9, 541 (2010). H. Lin et al., Nat. Mater. 9, 546 (2010).
18 Predicting new compounds ScNiSb LaPtBi LaPtBi S. Chadov et al., Nat. Mater. 9, 541 (2010). H. Lin et al., Nat. Mater. 9, 546 (2010).
19 Electronic structure CdTe HgTe ScPtSb ScPtBi Chadov, Qi, Kübler, Zhang, Felser Nature Mat. 9 (2010) 541, arxiv:
20 S. Chadov et al., Nat. Mater. 9, 541 (2010). H. Lin et al., Nat. Mater. 9, 546 (2010). Electronic structure
21 Z. K. Liu et al. Nature Com. 7 (2016) ARPES of LnPtBi
22 Dirac and Weyl semimetals Paul Klee
23 Hunting Majorana I (na) H y (T) The nontrivial Josephson coupling leads to a current flux relation with a half period in a superconducting quantum interference device geometry R. Klett, K. Rott, G. Reiss, C. Shekhar, W. Wernsdörfer D. Ebke, C. Felser, in preparation
24 YPtBi
25 Structure to Property HgTe Ag 2 Te LaPtBi Ag 2 Te Li 2 AgSb AuTlS 2 KHgSb
26 Honeycomb from sp3 to sp2 Band inversion is found in the heavier compounds No surface state? Why? Interaction between the two layers in the unit cell and two Dirac Cones Zhang, Chadov, Müchler, Yan, Qi, Kübler, Zhang, Felser, Phys. Rev. Lett. 106 (2011) arxiv: v1
27 a) b)
28 Honeycomb from sp3 to sp2 KZnP LiAuTe KHgSb Zhang, Chadov, Müchler, Yan, Qi, Kübler, Zhang, Felser, Phys. Rev. Lett. 106 (2011) arxiv: v1
29 Honeycomb: Weak TI Yan, Müchler, Felser, Physical Review Lett. 109 (2012)
30 Wang et al. Nature 2016 Hourglass
31 Weyl Semimetals Breaking symmtery TaAs
32 Dirac and Weyl semimetals Paul Klee
33 Bohm Jung Yang and Naoto Nagaosa, arxiv: Dirac semimetals
34 Weyl semimetals
35 NbP, NbAs, TaP, TaAs Weyl semimetals in non centro NbP NbP is a topologicalweylsemimetal with massless relativistic electrons extremely large magnetoresistance of 850,000% at 1.85 K, 9T (250% at room temperature) an ultrahigh carrier mobility of 5*10 6 cm 2 / V s Shekhar, et al., Nature Physics 11 (2015) 645, Frank Arnold, et al. Nature Communication 7 (2016) Weng, et al. Phys. Rev. X 5, (2015) Huang. et al. preprint arxiv: Yang, et al. Nature Phys. 11 (2015) 728, preprint arxiv: v1
36 NbP quantum oscillations Shekhar, et al., Nature Physics 11 (2015) 645, preprint arxiv:
37 NbP, TaP, TaAs NbAs TaP Z. K. Liu et al., Nature Mat. 15 (2016) 27
38 Mo 4+ (d 2 ) S 2 (s 2 p 6 ) MoS 2 : crystal field 2 H 1T 1T, Td dxz, dyz dz 2, dx 2 y 2 dz 2 dx 2 y 2 dxy, dx 2 yy 2 dxy dz 2 dxy, dxz, dyz dxz, dyz Semiconductor Metal Semimetal
39 T d -MoTe 2 Y. Qi et al. Nature Com. 7 (2016) 11038, arxiv: (2015).
40 MoTe 2 : Weyl Semimetal? Weyl points similar to WTe 2 J. Jiang, Z. K. Liu, Y. Sun, H. F. Yang, R. Rajamathi, Y. P. Qi, L. X. Yang, C. Chen, H. Peng, C. C. Hwang, S. Z. Sun, S. K. Mo, I. Vobornik, J. Fujii, S. S. P. Parkin, C. Felser, B. H. Yan, Y. L. Chen, preprint: arxiv:
41 MoTe 2 1T Td Y. Qi et al. Nature Com. 7 (2016) 11038, arxiv: (2015).
42 Magnetic Weyl Semimetals Induced Intrinsic
43 REPtBi multifunctional topologic insulators Multifunctional properties RE: Gd Magnetism and TI Antiferromagnetismwith GdPtBi RE RE: Ce complex behaviour of the Fermi surface RE: Yb Kondo insulator and TI YbPtBi is a super heavy fermion with the highest value Pt RE Bi (+f n ) + 5 = 18 S. Chadov et al., Nat. Mater. 9, 541 (2010). H. Lin et al., Nat. Mater. 9, 546 (2010).
44 Weyl semimetals We need time reversal symmetry breaking (Dirac points are at high symmetry points Weyl points are not at high symmetry yp points) Structural distortion Application of magnetic field or magnetism 3D topological Weyl semimetals breaking Time reversal symmetry by transport 1. Intrinsic anomalous Hall effect 2. Chiral anomaly S. L. Adler, Phys. Rev. 177, 2426 (1969) J. S. Bell and R. Jackiw, Nuovo Cim. A60, 47 (1969) AA Zyuzin, AA Burkov Physical Review B (2012) AA Burkov, L Balents, PRL (2012)
45 GdPtBi is magnetic D ) M ( B /f.u ( ) [110] B ll B ll [111] 1.4K 15 K, B ll [111] 100 K, B ll [111] GdPtBi is an Antiferromagnet below 10 K However it is very soft and the spins can be tuned in a magnetic field H (T) C. Shekhar et al., arxiv: , (2016).
46 Weyl GdPtBi in a magnetic field C. Shekhar et al., arxiv: , (2016). M. Hirschberger et al.,. Nature Mat. Online arxiv: , (2016).
47 GdPtBi Anomalous Hall Effect Inferromagnets an AHEscales with the magnetic moment Antiferromagnet show no AHE A Hall angle of 0.2 is exceptional 1 would be the Quantum AHE T. Suzuki, & J. G. Checkelsky, Nature Physics (2016) doi: /nphys3831 Shekhar et al., arxiv: , (2016)
48 Chiral Anomaly neg. quadratic MR C. Shekhar et al., arxiv: , (2016). M. Hirschberger et al. Nature Mat. online, arxiv: , (2016).
49 La partie de l'image avec l'id de relation rid7 n'a pas été trouvé dans le fichier. La partie de l'image avec l'id de relation rid9 n'a pas été trouvé dans le fichier. Magnetic Heusler compounds with and without inversion
50 Magnetic Heusler compounds with and without inversion 26 Valence electrons Zhijun Wang, et al., arxiv: Guoqing Chang et al., arxiv: Barth et al. PRB 81, Ouardi et al., Phys. Rev. Lett. 110 (2013)
51 Kübler, Felser, PRB 85 (2012) Vidal et al Appl.Phys.Lett. 99 (2011) Kübler, Felser, Europhys. Lett. 114 (2016) AHE in half metallic ferromagnets
52 Giant AHE in Co 2 MnAl AHE in half metallic ferromagnets xy xy 1800 S/cm 2000 S/cm calc. meas. Kübler, Felser, PRB 85 (2012) Vidal et al Appl.Phys.Lett. 99 (2011) Kübler, Felser, Europhys. Lett. 114 (2016) Weyl points are the origin for a large Berry phase and a Giant AHE
53 Application Spin Hall Effect
54 Structural distortion of Heusler I4/mmm (D0 22 ) Fm3m (L2 1 ) P6 3 /mmc (D0 19 ) tetragonal cubic hexagonal
55 Chen, Niu, and MacDonald, Phys. Rev. Lett., 112 (2014) Kübler and Felser EPL 108 (2014) Hexagonal Antiferromagnet
56 Non-collinear AFM in metallic Mn 3 Ge The anomalous Hall conductivities are normally assumed to be proportional to magnetization Kübler and Felser EPL 108 (2014) 67001
57 Non-collinear AFM Mn 3 Ge/Mn 3 Sn Nayak et al. preprint: arxiv: , Science Advances in print Kiyohara, Nakatsuji, preprint: arxiv: , Nakatsuji, Kiyohara, & Higo, Nature, doi: /nature15723
58 Hao Yang, et al., preprint: arxiv: Fermiarcs in the Weyl AFM
59 Universe applying a lattice Carlo Beenakker Commentary Heisenberg (1930): We observe space as a continuum, but we might entertain the thought that there is an underlying lattice and that space is actually a crystal. Which particles would inhabit such a lattice world? Werner Heisenberg Gitterwelt (lattice world) hosted electrons that could morph into protons, photons that were not massless, and more peculiarities that compelled him to abandon this completely crazy idea
60 New Fermions Fermions in condensed-matter systems are not constrained by Poincare symmetry. Instead, they must only respect the crystal symmetry of one of the 230 space groups. Hence, there is the potential to find and classify free fermionic excitations in solid-state systems that have no high-energy counterparts. What comes next? Magnetic Space groups Ag 3 Se 2 Au, Ba 4Bi 3 Science, 353, 6299, (2016)
61 Can we do something useful- Catalysis Dirac and Weyl semimetals Linear bands electron and holes with high mobilties High mobilityof electrons and holes reduces the probabilty of recombinationof electron hole pairs in redox reaction Toplogical connection between the two surfaces via Fermi arcs
62 Catalysis Hydrogen evolution reaction
63 Weyl and catalysis
64 Comparison with other catalysts Materials Gibbs free energy ( GH* (ev)) NbP 0.31 TaP 0.38 TA TaAs NbAs 0.96 Pt 0.1 Ni (111) H TaS T TaS Td MoTe T H MoS g -1 Activity mol g NbP powder NbP crystal Ni TOF (h -1 ) 80 ity ( mol m -2 ) Activi NbP Ni Sr0.9NbO3 Catalysts
65 Summary Solid State Chemistry can have an impact on topological effects Topological insultors (Oxides, correlated systems) Weyl and Dirac semimetals.. Applications in Electronics AHE SHE QAHE chemistry (catalysis) Graf, Felser, Parkin, IEEE TRANSACTIONS ON MAGNETICS 47 (2011) 367 Graf, Felser, Parkin, Progress in Solid State Chemistry 39 (2011) 1
Heusler compounds: Tunable materials with non trivial topologies. Claudia Felser
Heusler compounds: Tunable materials with non trivial topologies Claudia Felser Tunability of Heusler compounds Tuning the band gap Tuning spin orbit coupling Trivial and topological Heusler Adding spins
Topology: crystal structure and bands
Topology: crystal structure and bands Claudia Felser Nature Topology in Chemistry Molecules with different chirali4es can have different physical and chemical proper4es Topology in Chemistry Aroma4c compounds
Dirac fermions in condensed matters
Dirac fermions in condensed matters Bohm Jung Yang Department of Physics and Astronomy, Seoul National University Outline 1. Dirac fermions in relativistic wave equations 2. How do Dirac fermions appear
The orientation of the measured single crystal was performed and crystal structure of NbP was
Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal candidate NbP Chandra Shekhar 1, Ajaya K. Nayak 1, Yan Sun 1, Marcus Schmidt 1, Michael Nicklas 1, Inge Leermakers
Emergent topological phenomena in antiferromagnets with noncoplanar spins
Emergent topological phenomena in antiferromagnets with noncoplanar spins - Surface quantum Hall effect - Dimensional crossover Bohm-Jung Yang (RIKEN, Center for Emergent Matter Science (CEMS), Japan)
Influence of tetragonal distortion on the topological electronic structure. of the half-heusler compound LaPtBi from first principles
Influence of tetragonal distortion on the topological electronic structure of the half-heusler compound LaPtBi from first principles X. M. Zhang, 1,3 W. H. Wang, 1, a) E. K. Liu, 1 G. D. Liu, 3 Z. Y. Liu,
Introductory lecture on topological insulators. Reza Asgari
Introductory lecture on topological insulators Reza Asgari Workshop on graphene and topological insulators, IPM. 19-20 Oct. 2011 Outlines -Introduction New phases of materials, Insulators -Theory quantum
arxiv: v2 [cond-mat.mtrl-sci] 4 Jan 2018
![arxiv: v2 [cond-mat.mtrl-sci] 4 Jan 2018](/thumbs/76/74126885.jpg "arxiv: v2 [cond-mat.mtrl-sci] 4 Jan 2018")
Weyl Fermions in antiferromagnetic Mn Sn and Mn Ge Jürgen Kübler 1 and Claudia Felser 2 1 Technische Universität Darmstadt, Germany and 2 Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
Topological insulator (TI)
Topological insulator (TI) Haldane model: QHE without Landau level Quantized spin Hall effect: 2D topological insulators: Kane-Mele model for graphene HgTe quantum well InAs/GaSb quantum well 3D topological
3D Weyl metallic states realized in the Bi 1-x Sb x alloy and BiTeI. Heon-Jung Kim Department of Physics, Daegu University, Korea
3D Weyl metallic states realized in the Bi 1-x Sb x alloy and BiTeI Heon-Jung Kim Department of Physics, Daegu University, Korea Content 3D Dirac metals Search for 3D generalization of graphene Bi 1-x
Weyl semimetals from chiral anomaly to fractional chiral metal
Weyl semimetals from chiral anomaly to fractional chiral metal Jens Hjörleifur Bárðarson Max Planck Institute for the Physics of Complex Systems, Dresden KTH Royal Institute of Technology, Stockholm J.
1. Chiral anomaly in Na 3 Bi and the half-heusler GdPtBi 2. Thermopower of Weyl fermions 3. Prelim results on nonsymmorphic semimetal KHgSb
Workshop Topological Quantum Matter, KITP-UCSB Oct. 2016 The chiral anomaly in Dirac and Weyl Semimetals Jun Xiong Kushwaha Tian Liang Jason Krizan Hirschberger Zhijun Wang Quinn Gibson Cano Bradlyn S.H.
SOLID STATE CHEMISTRY
Exceptional transport properties of topological semimetals and metals Chandra Shekhar #, Claudia Felser, Satya N. Guin, Nitesh Kumar, Kaustuv Manna, Marcus Schmidt, Vicky Sü Topological materials (TMs)
Topological Insulators and Superconductors. Tokyo 2010 Shoucheng Zhang, Stanford University
Topological Insulators and Superconductors Tokyo 2010 Shoucheng Zhang, Stanford University Colloborators Stanford group: Xiaoliang Qi, Andrei Bernevig, Congjun Wu, Chaoxing Liu, Taylor Hughes, Sri Raghu,
Set-membership approach to fault prognosis: a prospective viewpoint
Set-membership approach to fault prognosis: a prospective viewpoint L. Travé-Massuyès & DISCO colleagues ECC 2014 Workshop June 2014 Corrective maintenance framework From (Ribot, Pencolé, Combacau,2009)
Topological Insulators
Topological Insulators A new state of matter with three dimensional topological electronic order L. Andrew Wray Lawrence Berkeley National Lab Princeton University Surface States (Topological Order in
Scientific Challenges in Climate Modelling
Scientific Challenges in Climate Modelling Jochem Marotzke Max-Planck-Institut für Meteorologie KlimaCampus, Hamburg Outline 1. HPC requirements by climate modelling 2. Example of high-resolution climate
arxiv: v1 [cond-mat.mes-hall] 29 Jul 2010
![arxiv: v1 [cond-mat.mes-hall] 29 Jul 2010](/thumbs/94/121300146.jpg "arxiv: v1 [cond-mat.mes-hall] 29 Jul 2010")
Discovery of several large families of Topological Insulator classes with backscattering-suppressed spin-polarized single-dirac-cone on the surface arxiv:1007.5111v1 [cond-mat.mes-hall] 29 Jul 2010 Su-Yang
Talk 2: Boulder Summer School, July 2016 Dirac and Weyl Semimetals and the chiral anomaly
Talk 2: Boulder Summer School, July 2016 Dirac and Weyl Semimetals and the chiral anomaly Jun Xiong Kushwaha Tian Liang Jason Krizan Hirschberger Zhijun Wang Quinn Gibson Cano Bradlyn Jinwoong Kim Kioussis
Massive Dirac Fermion on the Surface of a magnetically doped Topological Insulator
SLAC-PUB-14357 Massive Dirac Fermion on the Surface of a magnetically doped Topological Insulator Y. L. Chen 1,2,3, J.-H. Chu 1,2, J. G. Analytis 1,2, Z. K. Liu 1,2, K. Igarashi 4, H.-H. Kuo 1,2, X. L.
What is a topological insulator? Ming-Che Chang Dept of Physics, NTNU
What is a topological insulator? Ming-Che Chang Dept of Physics, NTNU A mini course on topology extrinsic curvature K vs intrinsic (Gaussian) curvature G K 0 G 0 G>0 G=0 K 0 G=0 G
Weyl fermions and the Anomalous Hall Effect
Weyl fermions and the Anomalous Hall Effect Anton Burkov CAP congress, Montreal, May 29, 2013 Outline Introduction: Weyl fermions in condensed matter, Weyl semimetals. Anomalous Hall Effect in ferromagnets
Topological Insulators
Topological Insulators Aira Furusai (Condensed Matter Theory Lab.) = topological insulators (3d and 2d) Outline Introduction: band theory Example of topological insulators: integer quantum Hall effect
Spin Hall and quantum spin Hall effects. Shuichi Murakami Department of Physics, Tokyo Institute of Technology PRESTO, JST
YKIS2007 (Kyoto) Nov.16, 2007 Spin Hall and quantum spin Hall effects Shuichi Murakami Department of Physics, Tokyo Institute of Technology PRESTO, JST Introduction Spin Hall effect spin Hall effect in
arxiv: v2 [cond-mat.mtrl-sci] 17 Aug 2016
![arxiv: v2 [cond-mat.mtrl-sci] 17 Aug 2016](/thumbs/78/78761442.jpg "arxiv: v2 [cond-mat.mtrl-sci] 17 Aug 2016")
Topological Weyl semimetals in the chiral antiferromagnetic materials Mn 3 Ge and Mn 3 Sn Hao Yang, 1, 2 Yan Sun, 1 Yang Zhang, 1, 3 Wu-Jun Shi, 4, 1 Stuart S. P. Parkin, 2 1, 5, and Binghai Yan 1 Max
High-throughput discovery of topological materials using spin-orbit spillage
High-throughput discovery of topological materials using spin-orbit spillage Kamal Choudhary, Kevin F. Garrity, Francesca Tavazza 1 Materials Science and Engineering Division, National Institute of Standards
Band Topology Theory and Topological Materials Prediction
Band Topology Theory and Topological Materials Prediction Hongming Weng ( 翁红明 ) Institute of Physics,! Chinese Academy of Sciences Dec. 19-23@IOP, CAS, Beijing 2016 Nobel Prize in Physics TKNN number Haldane
Symmetry Protected Topological Insulators and Semimetals
Symmetry Protected Topological Insulators and Semimetals I. Introduction : Many examples of topological band phenomena II. Recent developments : - Line node semimetal Kim, Wieder, Kane, Rappe, PRL 115,
LCI -birthplace of liquid crystal display. May, protests. Fashion school is in top-3 in USA. Clinical Psychology program is Top-5 in USA
LCI -birthplace of liquid crystal display May, 4 1970 protests Fashion school is in top-3 in USA Clinical Psychology program is Top-5 in USA Topological insulators driven by electron spin Maxim Dzero Kent
3D topological insulators and half- Heusler compounds
3D topological insulators and half- Heusler compounds Ram Seshadri Materials Department, and Department of Chemistry and Biochemistry Materials Research Laboratory University of California, Santa Barbara
Supplementary Figure 1. Magneto-transport characteristics of topological semimetal Cd 3 As 2 microribbon. (a) Measured resistance (R) as a function
Supplementary Figure 1. Magneto-transport characteristics of topological semimetal Cd 3 As 2 microribbon. (a) Measured resistance (R) as a function of temperature (T) at zero magnetic field. (b) Magnetoresistance
Weyl semi-metal: a New Topological State in Condensed Matter
Weyl semi-metal: a New Topological State in Condensed Matter Sergey Savrasov Department of Physics, University of California, Davis Xiangang Wan Nanjing University Ari Turner and Ashvin Vishwanath UC Berkeley
Chiral Majorana fermion from quantum anomalous Hall plateau transition
Chiral Majorana fermion from quantum anomalous Hall plateau transition Phys. Rev. B, 2015 王靖复旦大学物理系 wjingphys@fudan.edu.cn Science, 2017 1 Acknowledgements Stanford Biao Lian Quan Zhou Xiao-Liang Qi Shou-Cheng
A new class of topological insulators from I-III-IV half-heusler. compounds with strong band inversion strength
A new class of topological insulators from I-III-IV half-heusler compounds with strong band inversion strength X. M. Zhang, 1 G. Z. Xu, 1 Y. Du, 1 E. K. Liu, 1 Z. Y. Liu, 2 W. H. Wang 1(a) and G. H. Wu
Introduction to topological insulators. Jennifer Cano
Introduction to topological insulators Jennifer Cano Adapted from Charlie Kane s Windsor Lectures: http://www.physics.upenn.edu/~kane/ Review article: Hasan & Kane Rev. Mod. Phys. 2010 What is an insulator?
Observation of Unusual Topological Surface States in Half- Heusler Compounds LnPtBi (Ln=Lu, Y)
Observation of Unusual Topological Surface States in Half- Heusler Compounds LnPtBi (Ln=Lu, Y) Z. K. Liu 1,2, L. X. Yang 3, S. C. Wu 4, C. Shekhar 4, J. Jiang 1,5, H. F. Yang 6, Y. Zhang 5, S. K. Mo 5,
/21. Tsuneya Yoshida. Collaborators: Robert Peters, Satoshi Fujimoto, and N. Kawakami 2013/6/07 (EQPCM) 1. Kyoto Univ.
2013/6/07 (EQPCM) 1 /21 Tsuneya Yoshida Kyoto Univ. Collaborators: Robert Peters, Satoshi Fujimoto, and N. Kawakami T.Y., Satoshi Fujimoto, and Norio Kawakami Phys. Rev. B 85, 125113 (2012) Outline 2 /21
Part 1. March 5, 2014 Quantum Hadron Physics Laboratory, RIKEN, Wako, Japan 2
MAR 5, 2014 Part 1 March 5, 2014 Quantum Hadron Physics Laboratory, RIKEN, Wako, Japan 2 ! Examples of relativistic matter Electrons, protons, quarks inside compact stars (white dwarfs, neutron, hybrid
Nanostructured Carbon Allotropes as Weyl-Like Semimetals
Nanostructured Carbon Allotropes as Weyl-Like Semimetals Shengbai Zhang Department of Physics, Applied Physics & Astronomy Rensselaer Polytechnic Institute symmetry In quantum mechanics, symmetry can be
arxiv: v2 [cond-mat.mtrl-sci] 22 Jun 2015
![arxiv: v2 [cond-mat.mtrl-sci] 22 Jun 2015](/thumbs/72/66282440.jpg "arxiv: v2 [cond-mat.mtrl-sci] 22 Jun 2015")
Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal NbP Chandra Shekhar 1, Ajaya K. Nayak 1, Yan Sun 1, Marcus Schmidt 1, Michael Nicklas 1, Inge Leermakers 2, arxiv:1502.04361v2
ARPES experiments on 3D topological insulators. Inna Vishik Physics 250 (Special topics: spectroscopies of quantum materials) UC Davis, Fall 2016
ARPES experiments on 3D topological insulators Inna Vishik Physics 250 (Special topics: spectroscopies of quantum materials) UC Davis, Fall 2016 Outline Using ARPES to demonstrate that certain materials
High-pressure studies of topological materials Sergey Medvedev #, Moaz ElGhazali, Claudia Felser, Pavel Naumov and Yanpeng Qi
High-pressure studies of topological materials Sergey Medvedev #, Moaz ElGhazali, Claudia Felser, Pavel Naumov and Yanpeng Qi Transition-metal dichalcogenides (TMDs, TX 2), where T is a transition-metal
Basics of topological insulator
011/11/18 @ NTU Basics of topological insulator Ming-Che Chang Dept of Physics, NTNU A brief history of insulators Band insulator (Wilson, Bloch) Mott insulator Anderson insulator Quantum Hall insulator
Visualizing Electronic Structures of Quantum Materials By Angle Resolved Photoemission Spectroscopy (ARPES)
Visualizing Electronic Structures of Quantum Materials By Angle Resolved Photoemission Spectroscopy (ARPES) PART A: ARPES & Application Yulin Chen Oxford University / Tsinghua University www.arpes.org.uk
Emergent technology based on Fermi-arcs?
Emergent technology based on Fermi-arcs? Transport evidence for Fermi-arc-mediated chirality transfer in the Dirac semimetal Cd 3 As 2 P. J. W. Moll, N. L. Nair, T. Helm, A. C. Potter, I. Kimchi, A. Vishwanath,
Topological Heterostructures by Molecular Beam Epitaxy
Topological Heterostructures by Molecular Beam Epitaxy Susanne Stemmer Materials Department, University of California, Santa Barbara Fine Lecture, Northwestern University February 20, 2018 Stemmer Group
A Short Introduction to Topological Superconductors
A Short Introduction to Topological Superconductors --- A Glimpse of Topological Phases of Matter Jyong-Hao Chen Condensed Matter Theory, PSI & Institute for Theoretical Physics, ETHZ Dec. 09, 2015 @ Superconductivity
The Quantum Spin Hall Effect
The Quantum Spin Hall Effect Shou-Cheng Zhang Stanford University with Andrei Bernevig, Taylor Hughes Science, 314,1757 2006 Molenamp et al, Science, 318, 766 2007 XL Qi, T. Hughes, SCZ preprint The quantum
Topological Defects inside a Topological Band Insulator
Topological Defects inside a Topological Band Insulator Ashvin Vishwanath UC Berkeley Refs: Ran, Zhang A.V., Nature Physics 5, 289 (2009). Hosur, Ryu, AV arxiv: 0908.2691 Part 1: Outline A toy model of
Quantum Spin Hall Effect: a theoretical and experimental introduction at kindergarten level, non-shown version
Quantum Spin Hall Effect: a theoretical and experimental introduction at kindergarten level, non-shown version Ze-Yang Li 1, Jia-Chen Yu 2 and Shang-Jie Xue 3 December 21, 2015 1 光学所 2 凝聚态所 3 量 材料中 Historical
Graphite, graphene and relativistic electrons
Graphite, graphene and relativistic electrons Introduction Physics of E. graphene Y. Andrei Experiments Rutgers University Transport electric field effect Quantum Hall Effect chiral fermions STM Dirac
Ultrafast study of Dirac fermions in out of equilibrium Topological Insulators
Ultrafast study of Dirac fermions in out of equilibrium Topological Insulators Marino Marsi Laboratoire de Physique des Solides CNRS Univ. Paris-Sud - Université Paris-Saclay IMPACT, Cargèse, August 26
InAs/GaSb A New 2D Topological Insulator
InAs/GaSb A New 2D Topological Insulator 1. Old Material for New Physics 2. Quantized Edge Modes 3. Adreev Reflection 4. Summary Rui-Rui Du Rice University Superconductor Hybrids Villard de Lans, France
Topological insulators and the quantum anomalous Hall state. David Vanderbilt Rutgers University
Topological insulators and the quantum anomalous Hall state David Vanderbilt Rutgers University Outline Berry curvature and topology 2D quantum anomalous Hall (QAH) insulator TR-invariant insulators (Z
Notes on Topological Insulators and Quantum Spin Hall Effect. Jouko Nieminen Tampere University of Technology.
Notes on Topological Insulators and Quantum Spin Hall Effect Jouko Nieminen Tampere University of Technology. Not so much discussed concept in this session: topology. In math, topology discards small details
Weyl and Transport. Claudia Felser. Nature
Weyl and Transport Claudia Felser Nature Graphene Graphene s conduc2vity exhibits values close to the conduc2vity quantum e2/h per carrier type Graphene s charge carriers can be tuned con2nuously between
Dirac and Weyl fermions in condensed matter systems: an introduction
Dirac and Weyl fermions in condensed matter systems: an introduction Fa Wang ( 王垡 ) ICQM, Peking University 第二届理论物理研讨会 Preamble: Dirac/Weyl fermions Dirac equation: reconciliation of special relativity
Large anomalous Hall effect driven by non-vanishing Berry curvature in non-collinear antiferromagnetic Mn 3 Ge
Large anomalous Hall effect driven by non-vanishing Berry curvature in non-collinear antiferromagnetic Mn 3 Ge Ajaya K. Nayak, 1,2,* Julia Erika Fischer, 1 Yan Sun, 1 Binghai Yan, 1 Julie Karel, 1 Alexander
Giant anomalous Hall angle in a half-metallic magnetic Weyl semimetal
Giant anomalous Hall angle in a half-metallic magnetic Weyl semimetal Enke Liu 1,2, Yan Sun 1, Lukas Müchler 3, Aili Sun 1, Lin Jiao 1, Johannes Kroder 1, Vicky Süß 1, Horst Borrmann 1, Wenhong Wang 2,
Physics in two dimensions in the lab
Physics in two dimensions in the lab Nanodevice Physics Lab David Cobden PAB 308 Collaborators at UW Oscar Vilches (Low Temperature Lab) Xiaodong Xu (Nanoscale Optoelectronics Lab) Jiun Haw Chu (Quantum
Ultrafast surface carrier dynamics in topological insulators: Bi 2 Te 3. Marino Marsi
Ultrafast surface carrier dynamics in topological insulators: Bi 2 Te 3 Marino Marsi Laboratoire de Physique des Solides CNRS UMR 8502 - Université Paris-Sud IMPACT, Orsay, September 2012 Outline Topological
Topological insulators. Pavel Buividovich (Regensburg)
Topological insulators Pavel Buividovich (Regensburg) Hall effect Classical treatment Dissipative motion for point-like particles (Drude theory) Steady motion Classical Hall effect Cyclotron frequency
GROWTH OF QUANTUM WELL FILMS OF TOPOLOGICAL INSULATOR BI 2 SE 3 ON INSULATING SUBSTRATE
GROWTH OF QUANTUM WELL FILMS OF TOPOLOGICAL INSULATOR BI 2 SE 3 ON INSULATING SUBSTRATE CUI-ZU CHANG, KE HE *, LI-LI WANG AND XU-CUN MA Institute of Physics, Chinese Academy of Sciences, Beijing 100190,
Weyl semimetals and topological phase transitions
Weyl semimetals and topological phase transitions Shuichi Murakami 1 Department of Physics, Tokyo Institute of Technology 2 TIES, Tokyo Institute of Technology 3 CREST, JST Collaborators: R. Okugawa (Tokyo
Emergent Frontiers in Quantum Materials:
Emergent Frontiers in Quantum Materials: High Temperature superconductivity and Topological Phases Jiun-Haw Chu University of Washington The nature of the problem in Condensed Matter Physics Consider a
arxiv: v1 [cond-mat.other] 20 Apr 2010
![arxiv: v1 [cond-mat.other] 20 Apr 2010](/thumbs/93/114512366.jpg "arxiv: v1 [cond-mat.other] 20 Apr 2010")
Characterization of 3d topological insulators by 2d invariants Rahul Roy Rudolf Peierls Centre for Theoretical Physics, 1 Keble Road, Oxford, OX1 3NP, UK arxiv:1004.3507v1 [cond-mat.other] 20 Apr 2010
Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co 3 Sn 2 S 2
Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co 3 Sn 2 S 2 Authors: Noam Morali 1, Rajib Batabyal 1, Pranab Kumar Nag 1, Enke Liu 2,3, Qiunan Xu 2, Yan Sun 2, Binghai Yan
Time Reversal Invariant Ζ 2 Topological Insulator
Time Reversal Invariant Ζ Topological Insulator D Bloch Hamiltonians subject to the T constraint 1 ( ) ΘH Θ = H( ) with Θ = 1 are classified by a Ζ topological invariant (ν =,1) Understand via Bul-Boundary
single-layer transition metal dichalcogenides MC2
single-layer transition metal dichalcogenides MC2 Period 1 1 H 18 He 2 Group 1 2 Li Be Group 13 14 15 16 17 18 B C N O F Ne 3 4 Na K Mg Ca Group 3 4 5 6 7 8 9 10 11 12 Sc Ti V Cr Mn Fe Co Ni Cu Zn Al Ga
lectures accompanying the book: Solid State Physics: An Introduction, by Philip ofmann (2nd edition 2015, ISBN-10: 3527412824, ISBN-13: 978-3527412822, Wiley-VC Berlin. www.philiphofmann.net 1 Bonds between
Topological insulators
http://www.physik.uni-regensburg.de/forschung/fabian Topological insulators Jaroslav Fabian Institute for Theoretical Physics University of Regensburg Stara Lesna, 21.8.212 DFG SFB 689 what are topological
Electron transport through Shiba states induced by magnetic adsorbates on a superconductor
Electron transport through Shiba states induced by magnetic adsorbates on a superconductor Michael Ruby, Nino Hatter, Benjamin Heinrich Falko Pientka, Yang Peng, Felix von Oppen, Nacho Pascual, Katharina
Berry Phase Effects on Electronic Properties
Berry Phase Effects on Electronic Properties Qian Niu University of Texas at Austin Collaborators: D. Xiao, W. Yao, C.P. Chuu, D. Culcer, J.R.Shi, Y.G. Yao, G. Sundaram, M.C. Chang, T. Jungwirth, A.H.MacDonald,
Weyl Semimetals, Fermi Arcs and Chiral Anomalies (A Short Review)
Weyl Semimetals, Fermi Arcs and Chiral Anomalies (A Short Review) Shuang Jia, 1,2 Su-Yang Xu, 3 and M. Zahid Hasan 3,4 arxiv:1612.00416v2 [cond-mat.mes-hall] 7 Dec 2016 1 International Center for Quantum
Topological Kondo Insulator SmB 6. Tetsuya Takimoto
Topological Kondo Insulator SmB 6 J. Phys. Soc. Jpn. 80 123720, (2011). Tetsuya Takimoto Department of Physics, Hanyang University Collaborator: Ki-Hoon Lee (POSTECH) Content 1. Introduction of SmB 6 in-gap
Visualizing "Fermi arcs" in the Weyl semimetal TaAs
Visualizing "Fermi arcs" in the Weyl semimetal TaAs Rajib Batabyal 1, Noam Morali 1, Nurit Avraham 1, Yan Sun 2, Marcus Schmidt 2, Claudia Felser 2, Ady Stern 1, Binghai Yan 2, Haim Beidenkopf 1 1 Department
arxiv: v1 [cond-mat.mtrl-sci] 9 Mar 2013
![arxiv: v1 [cond-mat.mtrl-sci] 9 Mar 2013](/thumbs/86/94109325.jpg "arxiv: v1 [cond-mat.mtrl-sci] 9 Mar 2013")
Stacked topological insulator built from bismuth-based graphene sheet analogues Bertold Rasche 1, Anna Isaeva 1, Michael Ruck 1,2, Sergey Borisenko 3, Volodymyr Zabolotnyy 3, Bernd Büchner 3,4, Klaus Koepernik
Nonlinear electrodynamics in Weyl semimetals: Floquet bands and photocurrent generation
Oct 26, 2017 Nonlinear electrodynamics in Weyl semimetals: Floquet bands and photocurrent generation Theory Patrick Lee (MIT) Experiment Ching-Kit Chan University of California Los Angeles Su-Yang Xu,
Unconventional pairing in three-dimensional topological insulators with warped surface state Andrey Vasenko
Unconventional pairing in three-dimensional topological insulators with warped surface state Andrey Vasenko Moscow Institute of Electronics and Mathematics, Higher School of Economics Collaborators Alexander
Dirac semimetal in three dimensions
Dirac semimetal in three dimensions Steve M. Young, Saad Zaheer, Jeffrey C. Y. Teo, Charles L. Kane, Eugene J. Mele, and Andrew M. Rappe University of Pennsylvania 6/7/12 1 Dirac points in Graphene Without
Kouki Nakata. University of Basel. KN, S. K. Kim (UCLA), J. Klinovaja, D. Loss (2017) arxiv:
Magnon Transport Both in Ferromagnetic and Antiferromagnetic Insulating Magnets Kouki Nakata University of Basel KN, S. K. Kim (UCLA), J. Klinovaja, D. Loss (2017) arxiv:1707.07427 See also review article
Supplementary Figures
Supplementary Figures Supplementary Figure 1. Crystal structure of 1T -MoTe 2. (a) HAADF-STEM image of 1T -MoTe 2, looking down the [001] zone (scale bar, 0.5 nm). The area indicated by the red rectangle
Topological insulators
Oddelek za fiziko Seminar 1 b 1. letnik, II. stopnja Topological insulators Author: Žiga Kos Supervisor: prof. dr. Dragan Mihailović Ljubljana, June 24, 2013 Abstract In the seminar, the basic ideas behind
Topology and Correlations in Monolayer Crystals. Sanfeng Wu Department of Physics, MIT UCAS
Topology and Correlations in Monolayer Crystals Sanfeng Wu Department of Physics, MIT 12/25/2017 @ UCAS Topology and Correlations Quantum Hall Effects Experimental milestones in 1980s: Klaus von Klitzing;
Proximity-induced magnetization dynamics, interaction effects, and phase transitions on a topological surface
Proximity-induced magnetization dynamics, interaction effects, and phase transitions on a topological surface Ilya Eremin Theoretische Physik III, Ruhr-Uni Bochum Work done in collaboration with: F. Nogueira
Quantitative Mappings from Symmetry to Topology
Z. Song, Z. Fang and CF, PRL 119, 246402 (2017) CF and L. Fu, arxiv:1709.01929 Z. Song, T. Zhang, Z. Fang and CF arxiv:1711.11049 Z. Song, T. Zhang and CF arxiv:1711.11050 Quantitative Mappings from Symmetry
Topological Insulators and Ferromagnets: appearance of flat surface bands
Topological Insulators and Ferromagnets: appearance of flat surface bands Thomas Dahm University of Bielefeld T. Paananen and T. Dahm, PRB 87, 195447 (2013) T. Paananen et al, New J. Phys. 16, 033019 (2014)
Tutorial: Berry phase and Berry curvature in solids
Tutorial: Berry phase and Berry curvature in solids Justin Song Division of Physics, Nanyang Technological University (Singapore) & Institute of High Performance Computing (Singapore) Funding: (Singapore)
InAs/GaSb A New Quantum Spin Hall Insulator
InAs/GaSb A New Quantum Spin Hall Insulator Rui-Rui Du Rice University 1. Old Material for New Physics 2. Quantized Edge Modes 3. Andreev Reflection 4. Summary KITP Workshop on Topological Insulator/Superconductor
Topological Insulators and Superconductors
Topological Insulators and Superconductors Lecture #1: Topology and Band Theory Lecture #: Topological Insulators in and 3 dimensions Lecture #3: Topological Superconductors, Majorana Fermions an Topological
From colossal to zero: Controlling the Anomalous Hall Effect in Magnetic Heusler Compounds via Berry Curvature Design
From colossal to zero: Controlling the Anomalous Hall Effect in Magnetic Heusler Compounds via Berry Curvature Design Kaustuv Manna 1*, Lukas Muechler 1,2, Ting-Hui Kao 1, Rolf Stinshoff 1, Yang Zhang
Energy Spectrum and Broken spin-surface locking in Topological Insulator quantum dots
Energy Spectrum and Broken spin-surface locking in Topological Insulator quantum dots A. Kundu 1 1 Heinrich-Heine Universität Düsseldorf, Germany The Capri Spring School on Transport in Nanostructures
Carbon based Nanoscale Electronics
Carbon based Nanoscale Electronics 09 02 200802 2008 ME class Outline driving force for the carbon nanomaterial electronic properties of fullerene exploration of electronic carbon nanotube gold rush of
Ferromagnetism and Anomalous Hall Effect in Graphene
Ferromagnetism and Anomalous Hall Effect in Graphene Jing Shi Department of Physics & Astronomy, University of California, Riverside Graphene/YIG Introduction Outline Proximity induced ferromagnetism Quantized
Shuichi Murakami Department of Physics, Tokyo Institute of Technology
EQPCM, ISSP, U. Tokyo June, 2013 Berry curvature and topological phases for magnons Shuichi Murakami Department of Physics, Tokyo Institute of Technology Collaborators: R. Shindou (Tokyo Tech. Peking Univ.)
Hartmut Buhmann. Physikalisches Institut, EP3 Universität Würzburg Germany
Hartmut Buhmann Physikalisches Institut, EP3 Universität Würzburg Germany Part I and II Insulators and Topological Insulators HgTe crystal structure Part III quantum wells Two-Dimensional TI Quantum Spin
arxiv: v1 [cond-mat.supr-con] 18 Jul 2016
![arxiv: v1 [cond-mat.supr-con] 18 Jul 2016](/thumbs/77/76632143.jpg "arxiv: v1 [cond-mat.supr-con] 18 Jul 2016")
Mesoscopic superconductivity and high spin polarization coexisting at metallic point contacts on the Weyl semimetal TaAs Leena Aggarwal 1, Sirshendu Gayen 1, Shekhar Das 1, Ritesh Kumar 1, Vicky Süß 2,
Disordered topological insulators with time-reversal symmetry: Z 2 invariants
Keio Topo. Science (2016/11/18) Disordered topological insulators with time-reversal symmetry: Z 2 invariants Hosho Katsura Department of Physics, UTokyo Collaborators: Yutaka Akagi (UTokyo) Tohru Koma
TOPOLOGY IN CONDENSED MATTER SYSTEMS: MAJORANA MODES AND WEYL SEMIMETALS. Jan 23, 2012, University of Illinois, Urbana-Chamapaign
TOPOLOGY IN CONDENSED MATTER SYSTEMS: MAJORANA MODES AND WEYL SEMIMETALS Pavan Hosur UC Berkeley Jan 23, 2012, University of Illinois, Urbana-Chamapaign Acknowledgements Advisor: Ashvin Vishwanath UC Berkeley
arxiv: v2 [cond-mat.mtrl-sci] 5 Oct 2018
![arxiv: v2 [cond-mat.mtrl-sci] 5 Oct 2018](/thumbs/90/103305199.jpg "arxiv: v2 [cond-mat.mtrl-sci] 5 Oct 2018")
Bulk band inversion and surface Dirac cones in LaSb and LaBi : Prediction of a new topological heterostructure Urmimala Dey 1,*, Monodeep Chakraborty 1, A. Taraphder 1,2,3, and Sumanta Tewari 4 arxiv:1712.02495v2