Chapter 6 Spin Caloritronics 韩伟 量子材料科学中心 2015 年 11 月 22 日 2014 ICQM
Review of last class 1. Spin transfer torque 2. Spin orbit torque and spin Hall effect 3. Spin orbit torque and Rashba-Edestein effect 2
Review of last class John Slonczewski Luc Berger 3
1. Spin orbit torque Summary of this class t ST = ħ 2 ( ) 4
2. Spin Hall effect Summary of this class 5
Summary of this class 3. Rashba-Edelstein effect 6
Outline 1. Seebeck and Peltier effect 2. Spin Seebeck effect 3. Spin Peltier effect 4. Thermal spin injection 5. Thermal spin torque 6. Spin energy 7
Outline Goennenwein & Bauer, Nature Nanotech. (2012) 8
Outline 1. Seebeck and Peltier effect 9
Seebeck effect 10
Seebeck effect ΔT + + + + + + + + + + + + + + + + + + + ΔV Seebeck Coefficient( ) V T 11
Seebeck effect Thermocouple ΔV 12
Peltier effect 13
Peltier effect Heat flow + + + + + + + + + + + + + + + + + + I 14
Peltier effect Thermoelectric cooling, such as refrigerators 15
Outline 2. Spin Seebeck effect 16
Seebeck effect ΔT + + + + + + + + + + + + + + + + + + + ΔV Seebeck Coefficient( ) V T 17
Spin Seebeck effect in FM Metal Eiji Saitoh Uchida, et al, Nature (2008) 18
Spin Seebeck effect in FM Metal 19
Spin Seebeck effect in FM Metal 20
Spin Seebeck effect in FM Metal 21
Spin Seebeck effect in FM Metal 22
Spin Seebeck effect in FM Metal 23
SSE in FM Semiconductor Jaworski, et al, Nature Materials (2010) 24
SSE in FM Semiconductor 25
Magnon-phonon interaction 26
Magnon-phonon interaction 27
SSE in FM Semiconductor 28
Argument: SSE vs ANE 29
Argument: SSE vs ANE Huang, et al, PRL (2010) 30
Argument: SSE vs ANE Chia-Ling Chien Huang, et al, PRL (2010) 31
SSE in FM insulator ANE generated in conducting FM? How about insulating FM? 32
SSE in FM insulator 33
SSE in FM insulator Uchida, et al, Nature Materials (2010) 34
SSE in FM insulator 35
SSE in FM insulator Is this the key to solve the issue between SSE and ANE? 36
Proximity effect 37
SSE in FM insulator Huang, et al, PRL (2012) 38
Longitudinal vs. Transverse Kikkawa, et al, PRL (2013) 39
How to solve this issue? Homework Kikkawa, et al, PRL (2013) 40
SSE in compensated ferrimagnets 41
SSE in compensated ferrimagnets S Geprägs, et al, Nature Comm. (2016) 42
SSE in compensated ferrimagnets 43
SSE in Antiferromagnets Seki et al, PRL (2015). 44
SSE in Antiferromagnets 45
Giant SSE in InSb Jaworski, et al, Nature (2012) 46
Giant SSE in InSb 47
Giant SSE in InSb 48
Enhanced SSE at YIG-TI 49
Enhanced SSE at YIG-TI 50
Enhanced SSE at YIG-TI 51
休息 10 分钟 52
Seebeck effect of a MTJ Walter, et al, Nature Materials (2011) 53
Seebeck effect of a MTJ 54
Seebeck effect of a MTJ 55
Seebeck effect of a MTJ 56
Outline 3. Spin Peltier effect 57
Peltier effect Heat flow + + + + + + + + + + + + + + + + + + I 58
Spin Peltier effect Flipse, et al, Nature Nanotech (2012) 59
Spin Peltier effect 60
Spin Peltier effect 61
Spin Peltier effect Flipse, et al, PRL (2014) 62
Spin Peltier effect 63
Spin Peltier effect 64
Spin Peltier effect 65
Spin Peltier vs. Spin Seebeck 66
Outline 3. Thermal spin injection 67
Thermal Spin Injection Slachter, et al, Nature Physics (2010) 68
Thermal Spin Injection 69
Thermal Spin Injection Metal 70
Thermal Spin Injection 71
Thermal Spin Injection Metal 72
Thermal Spin Injection Metal 73
Semiconductor Thermal Spin Injection Breton, et al, Nature (2011) 74
Electrical spin injection Thermal Spin Injection Dash, et al, Nature (2009) 75
Thermal Spin Injection Breton, et al, Nature (2011) 76
Thermal Spin Injection 77
Thermal Spin Injection 78
Thermal Spin Injection 79
Thermal Spin Injection Jeon, et al, Nature Materials (2013) 80
Thermal Spin Injection 81
Thermal Spin Injection 82
Outline 4. Thermal spin torque 83
Thermal Spin torque Xia, et al, PRL (2011) 84
Thermal Spin torque 85
Thermal Spin torque Yu, et al, PRL (2010) 86
Thermal Spin torque 87
Thermal Spin torque Pushup, et al, PNAS (2015) 88
Thermal Spin torque 89
Outline 5. Spin energy 90
Spin Energy Kirihara, et al, Nature Materials (2012) 91
Spin Energy 92
Spin Energy 93
Spin Energy 94
Summary 1. Seebeck and Peltier effect 2. Spin Seebeck effect 3. Spin Peltier effect 4. Thermal spin injection 5. Thermal spin torque 6. Spin energy 95
Summary Goennenwein & Bauer, Nature Nanotech. (2012) 96
2. Spin Seebeck effect Summary 97
Summary 3. Spin Peltier effect 98
4. Thermal spin injection Summary 99
5. Thermal spin torque Summary 100
Summary 6. Spin energy 101
下一节课 : Nov.29th Chapter 7: Topological Spintronics 课件下载 : http://www.phy.pku.edu.cn/~labspin/teaching.html 2014 ICQM
谢谢! 2014 ICQM