Creation and detection of spin-polarized current using quantum point contact with spin-orbit interaction

被引：1

作者：

Yokouchi, Hiroto ^{[1
]}

Eto, Mikio ^{[1
]}

机构：

[1] Keio Univ, Fac Sci & Technol, Kohoku Ku, 3-14-1 Hiyoshi, Yokohama, Kanagawa 2238522, Japan

来源：

PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4, NO 2 | 2007年 / 4卷 / 02期

关键词：

D O I：

10.1002/pssc.200673266

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We have proposed that quantum point contacts (QPCs) can be a useful tool for producing spin-polarized currents in the presence of Rashba spin-orbit (SO) interaction [J. Phys. Soc. Jpn. 74, 1934 (2005)]. No magnetic field is required. When the conductance through a QPC is quantized in units of 2e(2) /h, the current is spin-polarized in the transverse direction. This spin polarization, which can be larger than 50% in InGaAs heterostructures, is elucidated using the S-matrix formalism. We also examine transport properties of a QPC connected to a ferromagnetic lead and show how to detect the spin-polarized current from the QPC. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：557 / +

页数：2

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