A Spin-Polarized Current Direction Controller Based on a Nonuniform Rashba Quantum Wire

doi:10.1088/0256-307X/30/5/057201

Chin. Phys. Lett.

2013, Vol. 30

Issue (5): 057201 DOI: 10.1088/0256-307X/30/5/057201

CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

A Spin-Polarized Current Direction Controller Based on a Nonuniform Rashba Quantum Wire

XU Zhong-Hui^1,2, XIAO Wen¹, CHEN Yu-Guang^1**

¹Department of Physics, Tongji University, Shanghai 200092
²Faculty of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000

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XU Zhong-Hui, XIAO Wen, CHEN Yu-Guang 2013 Chin. Phys. Lett. 30 057201

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Abstract A spin-polarized current direction controller scheme is proposed based on a nonuniform Rashba quantum wire. It is shown that |P_z^LR|=|P_z^RL|, whereas their signs are opposite, and the effect of this phenomenon is due to the two broken symmetries and the unbroken C₂-rotation symmetry of the investigated system. In addition, the spin-polarized current is nonzero even with a strong disorder strength, which demonstrates that this structure may be utilized for potential applications.

Received: 18 January 2013 Published: 31 May 2013

PACS:	72.25.Dc	(Spin polarized transport in semiconductors)
	73.21.Hb	(Quantum wires)
	71.70.Ej	(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)

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