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Spin transport at a Pt/InAs quantum well interface using spin Hall and Rashba effects

Authors
Jeon, JeehoonKim, Seong BeenKim, TaeyuebLee, OukJaeHan, Suk HeeKim, Hyung-junKoo, Hyun CheolHong, Jinki
Issue Date
27-7월-2020
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.117, no.4
Indexed
SCIE
SCOPUS
Journal Title
APPLIED PHYSICS LETTERS
Volume
117
Number
4
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/54346
DOI
10.1063/5.0019120
ISSN
0003-6951
Abstract
In the field of spintronics, charge-to-spin conversion without a ferromagnetic material has attracted intense interest from researchers seeking to realize a fully electrical spin device because this design obviates the need for magnetic field control of magnetization. Instead of spin injection from a ferromagnetic source, spin-Hall-induced pure spin current has recently attracted considerable interest for transferring spin information into the semiconductor channel. In the present work, the spin is injected from a platinum electrode via the direct spin Hall effect and is subsequently detected in a strong Rashba channel via the inverse spin Hall effect. Before being detected, the spin state is modulated by a gate voltage; the signal observed with various channel lengths and gate voltages demonstrates this Rashba precessional modulation. The addition of Zeeman precession induced by an external magnetic field provides the signal-elucidating definite spin motion in the channel and clear interplay between the Rashba and Zeeman processions. Our approach opens a fascinating possibility for realizing a ferromagnet-free system for use in low-power and high-temperature spin transistors.
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Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles

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