Spin-current generation and detection in the presence of an ac gate

2002/11/30 by A. G. Mal'shukov, A. G. Mal’shukov, C. S. Tang +3 · 4 citations
Engineering · Physics and Astronomy · #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #Semiconductor materials and devices #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.68.233307

published as Phys. Rev. B 68, 233307 (2003) · 4 pages, 2 figures, final version to be published in Phys. Rev. B

arxiv created 2003/11/06 · openalex publication_date 2003/12/24 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We predict that in a narrow gap III-V semiconductor quantum well or quantum wire, an observable electron spin current can be generated with a time-dependent gate to modify the Rashba spin-orbit coupling constant. Methods to rectify the so generated ac current are discussed. An all-electric method of spin-current detection is suggested, which measures the voltage on the gate in the vicinity of a two-dimensional electron gas carrying a time-dependent spin current. Both the generation and detection do not involve any optical or magnetic mediator.

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