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원자제어 저차원 전자계 연구단
원자제어 저차원 전자계 연구단
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Electrical detection of spin-polarized current in topological insulator Bi 1.5 Sb 0.5 Te 1.7 Se 1.3

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Title
Electrical detection of spin-polarized current in topological insulator Bi 1.5 Sb 0.5 Te 1.7 Se 1.3
Author(s)
Hwang T.-H.; Kim H.-S.; Hoil Kim; Jun Sung Kim; Doh Y.-J.
Publication Date
2019-08
Journal
CURRENT APPLIED PHYSICS, v.19, no.8, pp.917 - 923
Publisher
ELSEVIER SCIENCE BV
Abstract
© 2019 Korean Physical Society Spin-momentum locked (SML) topological surface state (TSS) provides exotic properties for spintronics applications. The spin-polarized current, which emerges owing to the SML, can be directly detected by performing spin potentiometric measurement. We observed spin-polarized current using a bulk insulating topological insulator (TI), Bi 1.5 Sb 0.5 Te 1.7 Se 1.3 , and Co as the ferromagnetic spin probe. The spin voltage was probed with varying the bias current, temperature, and gate voltage. Moreover, we observed non-local spin-polarized current, which is regarded as a distinguishing property of TIs. The spin-polarization ratio of the non-local current was larger than that of the local current. These findings could reveal a more accurate approach to determine spin-polarization ratio at the TSS
URI
https://pr.ibs.re.kr/handle/8788114/6443
ISSN
1567-1739
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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2019_Current Applied Physics_김준성(공동)_Electrical detection of spin-polarized current in topological insulator Bi1.5Sb0.5Te1.7Se1.3 _ Elsevier Enhanced Reader.pdfDownload

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