期刊
CURRENT APPLIED PHYSICS
卷 17, 期 11, 页码 1455-1458出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cap.2017.08.007
关键词
Potentiometric measurement; Electrochemical potential; Rashba effect; Spin torque
资金
- KIST Institutional Program
- National Research Council of Science & Technology (NST) grant by the Korea government (MSIP) [CAP-16-01-KIST]
- KU-KIST Institutional Program
Spin transport with a strong Rashba spin splitting is observed in a semiconductor channel. Using the current injection into the side of the quantum well, the potentiometric signal and the spin-torque-induced magnetization change are simultaneously detected. In this geometry, the spin current is directly injected from the ferromagnetic electrode into the quantum well channel and the electro-chemical potential is monitored by the detection ferromagnet. For the side injection instead of vertical injection, the milling of the top cladding layer is not necessary, so the efficient spin transport and the undamaged Rashba spin splitting can be realized. The ferromagnetic detector senses the Rashba-effect-induced electrochemical potential shift brought by the charge current and this potentiometric signal is also modified by the magnetization rotation induced by the spin current. The large potential changes of 1.03 Omega and 0.96 Omega are observed at 1.8 K and 300 K, respectively. (C) 2017 Elsevier B.V. All rights reserved.
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