Persistent spin and charge currents in an Aharonov-Casher conducting ring

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• 作者：L.G. Wang ; Y.L. Huang
• 关键词：Spin transport ; Persistent spin current ; Mesoscopic ring
• 刊名：Superlattices and Microstructures
• 出版年：February, 2014
• 年：2014
• 卷：66
• 期：Complete
• 页码：148-153
• 全文大小：775 K

文摘

We investigate the persistent spin and charge currents within an open mesoscopic ring embedded in a textured electric field. The persistent spin and charge currents are obtained analytically, and can be controlled by the electric field. Since the spin-up (down) electron can feel the different transverse spin forces generated by the spin-orbit coupling, the spin-up (down) electron will travel clockwise (anticlockwise) along the ring. As a result, the persistent charge current will change its direction within the ring according to different spin state electron injections, whilst the persistent spin current remains in the same direction. A pure persistent spin current, without any accompanying charge current, can be produced by tuning the strength and/or the angle of the textured electric field.