Chapter 6. Spin Caloritronics 韩伟 量子材料科学中心 2015 年 11 月 22 日 2014 ICQM

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1 Chapter 6 Spin Caloritronics 韩伟 量子材料科学中心 2015 年 11 月 22 日 2014 ICQM

2 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

3 Review of last class John Slonczewski Luc Berger 3

4 1. Spin orbit torque Summary of this class t ST = ħ 2 ( ) 4

5 2. Spin Hall effect Summary of this class 5

6 Summary of this class 3. Rashba-Edelstein effect 6

7 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

8 Outline Goennenwein & Bauer, Nature Nanotech. (2012) 8

9 Outline 1. Seebeck and Peltier effect 9

10 Seebeck effect 10

11 Seebeck effect ΔT ΔV Seebeck Coefficient( ) V T 11

12 Seebeck effect Thermocouple ΔV 12

13 Peltier effect 13

14 Peltier effect Heat flow I 14

15 Peltier effect Thermoelectric cooling, such as refrigerators 15

16 Outline 2. Spin Seebeck effect 16

17 Seebeck effect ΔT ΔV Seebeck Coefficient( ) V T 17

18 Spin Seebeck effect in FM Metal Eiji Saitoh Uchida, et al, Nature (2008) 18

19 Spin Seebeck effect in FM Metal 19

20 Spin Seebeck effect in FM Metal 20

21 Spin Seebeck effect in FM Metal 21

22 Spin Seebeck effect in FM Metal 22

23 Spin Seebeck effect in FM Metal 23

24 SSE in FM Semiconductor Jaworski, et al, Nature Materials (2010) 24

25 SSE in FM Semiconductor 25

26 Magnon-phonon interaction 26

27 Magnon-phonon interaction 27

28 SSE in FM Semiconductor 28

29 Argument: SSE vs ANE 29

30 Argument: SSE vs ANE Huang, et al, PRL (2010) 30

31 Argument: SSE vs ANE Chia-Ling Chien Huang, et al, PRL (2010) 31

32 SSE in FM insulator ANE generated in conducting FM? How about insulating FM? 32

33 SSE in FM insulator 33

34 SSE in FM insulator Uchida, et al, Nature Materials (2010) 34

35 SSE in FM insulator 35

36 SSE in FM insulator Is this the key to solve the issue between SSE and ANE? 36

37 Proximity effect 37

38 SSE in FM insulator Huang, et al, PRL (2012) 38

39 Longitudinal vs. Transverse Kikkawa, et al, PRL (2013) 39

40 How to solve this issue? Homework Kikkawa, et al, PRL (2013) 40

41 SSE in compensated ferrimagnets 41

42 SSE in compensated ferrimagnets S Geprägs, et al, Nature Comm. (2016) 42

43 SSE in compensated ferrimagnets 43

44 SSE in Antiferromagnets Seki et al, PRL (2015). 44

45 SSE in Antiferromagnets 45

46 Giant SSE in InSb Jaworski, et al, Nature (2012) 46

47 Giant SSE in InSb 47

48 Giant SSE in InSb 48

49 Enhanced SSE at YIG-TI 49

50 Enhanced SSE at YIG-TI 50

51 Enhanced SSE at YIG-TI 51

52 休息 10 分钟 52

53 Seebeck effect of a MTJ Walter, et al, Nature Materials (2011) 53

54 Seebeck effect of a MTJ 54

55 Seebeck effect of a MTJ 55

56 Seebeck effect of a MTJ 56

57 Outline 3. Spin Peltier effect 57

58 Peltier effect Heat flow I 58

59 Spin Peltier effect Flipse, et al, Nature Nanotech (2012) 59

60 Spin Peltier effect 60

61 Spin Peltier effect 61

62 Spin Peltier effect Flipse, et al, PRL (2014) 62

63 Spin Peltier effect 63

64 Spin Peltier effect 64

65 Spin Peltier effect 65

66 Spin Peltier vs. Spin Seebeck 66

67 Outline 3. Thermal spin injection 67

68 Thermal Spin Injection Slachter, et al, Nature Physics (2010) 68

69 Thermal Spin Injection 69

70 Thermal Spin Injection Metal 70

71 Thermal Spin Injection 71

72 Thermal Spin Injection Metal 72

73 Thermal Spin Injection Metal 73

74 Semiconductor Thermal Spin Injection Breton, et al, Nature (2011) 74

75 Electrical spin injection Thermal Spin Injection Dash, et al, Nature (2009) 75

76 Thermal Spin Injection Breton, et al, Nature (2011) 76

77 Thermal Spin Injection 77

78 Thermal Spin Injection 78

79 Thermal Spin Injection 79

80 Thermal Spin Injection Jeon, et al, Nature Materials (2013) 80

81 Thermal Spin Injection 81

82 Thermal Spin Injection 82

83 Outline 4. Thermal spin torque 83

84 Thermal Spin torque Xia, et al, PRL (2011) 84

85 Thermal Spin torque 85

86 Thermal Spin torque Yu, et al, PRL (2010) 86

87 Thermal Spin torque 87

88 Thermal Spin torque Pushup, et al, PNAS (2015) 88

89 Thermal Spin torque 89

90 Outline 5. Spin energy 90

91 Spin Energy Kirihara, et al, Nature Materials (2012) 91

92 Spin Energy 92

93 Spin Energy 93

94 Spin Energy 94

95 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

96 Summary Goennenwein & Bauer, Nature Nanotech. (2012) 96

97 2. Spin Seebeck effect Summary 97

98 Summary 3. Spin Peltier effect 98

99 4. Thermal spin injection Summary 99

100 5. Thermal spin torque Summary 100

101 Summary 6. Spin energy 101

102 下一节课 : Nov.29th Chapter 7: Topological Spintronics 课件下载 : ICQM

103 谢谢! 2014 ICQM