Electrical Detection of the Spin Polarization Due to Charge Flow in the Surface State of the Topological Insulator Bi1.5Sb0.5Te1.7Se1.3

被引：145

作者：

Ando, Yuichiro ^{[1
,2
]}

Hamasaki, Takahiro ^{[2
]}

Kurokawa, Takayuki ^{[2
]}

Ichiba, Kouki ^{[2
]}

Yang, Fan ^{[3
]}

Novak, Mario ^{[3
]}

Sasaki, Satoshi ^{[3
]}

Segawa, Kouji ^{[3
]}

Ando, Yoichi ^{[3
]}

Shiraishi, Masashi ^{[1
]}

机构：

[1] Kyoto Univ, Dept Elect Sci & Engn, Kyoto 6158531, Japan

[2] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

[3] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan

来源：

NANO LETTERS | 2014年 / 14卷 / 11期

关键词：

topological insulator; spin-momentum locking; spin current; electrical spin detection; DIRAC CONE;

D O I：

10.1021/nl502546c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We detected the spin polarization due to charge flow in the spin nondegenerate surface state of a three-dimensional topological insulator by means of an all-electrical method. The charge current in the bulk-insulating topological insulator Bi1.5Sb0.5Te1.7Se1.3 (BSTS) was injected/extracted through a ferromagnetic electrode made of Ni80Fe20, and an unusual current-direction-dependent magnetoresistance gave evidence for the appearance of spin polarization, which leads to a spin-dependent resistance at the BSTS/Ni80Fe20 interface. In contrast, our control experiment on Bi2Se3 gave null result. These observations demonstrate the importance of the Fermi-level control for the electrical detection of the spin polarization in topological insulators.

引用

页码：6226 / 6230

页数：5

共 48 条

[1] Electrical detection of spin-polarized current in topological insulator Bi1.5Sb0.5Te1.7Se1.3
Hwang, Tae-Ha
Kim, Hong-Seok
Kim, Hoil
Kim, Jun Sung
Doh, Yong-Joo
CURRENT APPLIED PHYSICS, 2019, 19 (08) : 917 - 923
[2] Atomic and electronic structure of an alloyed topological insulator, Bi1.5Sb0.5Te1.7Se1.3
Ko, Wonhee
Jeon, Insu
Kim, Hyo Won
Kwon, Hyeokshin
Kahng, Se-Jong
Park, Joonbum
Kim, Jun Sung
Hwang, Sung Woo
Suh, Hwansoo
SCIENTIFIC REPORTS, 2013, 3
[3] Enhanced surface mobility and quantum oscillations in topological insulator Bi1.5Sb0.5Te1.7Se1.3 nanoflakes
Hsiung, Te-Chih
Chen, Ding-Yuan
Zhao, Li
Lin, Yi-Hsin
Mou, Chung-Yu
Lee, Ting-Kuo
Wu, Maw-Kuen
Chen, Yang-Yuan
APPLIED PHYSICS LETTERS, 2013, 103 (16)
[4] Robust Protection from Backscattering in the Topological Insulator Bi1.5Sb0.5Te1.7Se1.3
Kim, Sunghun
Yoshizawa, Shunsuke
Ishida, Yukiaki
Eto, Kazuma
Segawa, Kouji
Ando, Yoichi
Shin, Shik
Komori, Fumio
PHYSICAL REVIEW LETTERS, 2014, 112 (13)
[5] Atomic and electronic structure of an alloyed topological insulator, Bi1.5Sb0.5Te1.7Se1.3
Wonhee Ko
Insu Jeon
Hyo Won Kim
Hyeokshin Kwon
Se-Jong Kahng
Joonbum Park
Jun Sung Kim
Sung Woo Hwang
Hwansoo Suh
Scientific Reports, 3
[6] Ultrafast carrier relaxation through Auger recombination in the topological insulator Bi1.5Sb0.5Te1.7Se1.3
Onishi, Yoshito
Ren, Zhi
Segawa, Kouji
Kaszub, Wawrzyniec
Lorenc, Maciej
Ando, Yoichi
Tanaka, Koichiro
PHYSICAL REVIEW B, 2015, 91 (08)
[7] Magneto-Transport Studies on Single Crystals of Bi1.5Sb0.5Te1.7Se1.3 Topological Insulator
Abhirami, S.
Sharma, Shilpam
Amaladass, E. P.
Mani, Awadhesh
DAE SOLID STATE PHYSICS SYMPOSIUM 2018, 2019, 2115
[8] Surface-dominated transport and enhanced thermoelectric figure of merit in topological insulator Bi1.5Sb0.5Te1.7Se1.3
Department of Physics, National Taiwan University, Taipei
106, Taiwan
不详
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11529, Taiwan
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30013, Taiwan
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116, Taiwan
Nanoscale, 2040, 2 (518-523):
[9] Surface-dominated transport and enhanced thermoelectric figure of merit in topological insulator Bi1.5Sb0.5Te1.7Se1.3
Hsiung, Te-Chih
Mou, Chung-Yu
Lee, Ting-Kuo
Chen, Yang-Yuan
NANOSCALE, 2015, 7 (02) : 518 - 523
[10] Ultrafast transient photocarrier dynamics of the bulk-insulating topological insulator Bi1.5Sb0.5Te1.7Se1.3
Choi, Young Gwan
Zhung, Chan June
Park, Sun-Hee
Park, Joonbum
Kim, Jun Sung
Kim, Seongheun
Park, Jaehun
Lee, J. S.
PHYSICAL REVIEW B, 2018, 97 (07)

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