The Side Effect of Spin Precession and Quantum Interference in a Four-Terminal Nano Device with Rashba Spin-Orbit Coupling

Abstract:

We propose a four-terminal nano device made of quantum wires with Rashba spin-orbit (SO) coupling. In each terminal there are several independent channels formed with quantum wires. The coherent transmission of electrons in such a nano system is a combined effect of quantum interference and spin precession. When defining two opposite terminals as source and drain leads, the charge and spin currents in channels of other two terminals exhibit spatial distributions which reflect the competition between spin precession and quantum interference during the tunneling of electrons. Since the four-terminal nano device is geometrically simple for the moving paths of charge and spin, our investigation may shed some light on the basic physical picture on this issue.

• Periodical: Advanced Materials Research (Volume 496)
• Pages: 351-354
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.496.351
• Online since: March 2012
• Authors: Hui Xian Wang, Li Ben Li, Da Wei Kang
• Keywords: Four-Terminal Nano Device, Quantum Interference, Rashba Spin-Orbit Coupling, Spin Precession

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