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American Institute of Physics, Applied Physics Letters, 10(92), p. 102111

DOI: 10.1063/1.2894582

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Spin current diode based on an electron waveguide with spin-orbit interaction

Journal article published in 2008 by Feng Zhai, Kai Chang, H. Q. Xu ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We propose a spin current diode which can work even in a small applied bias condition (the linear-response regime). The prototypal device consists of a hornlike electron waveguide with Rashba spin-orbit interaction, which is connected to two leads with different widths. It is demonstrated that when electrons are incident from the narrow lead, the generated spin conductance fluctuates around a constant value in a wide range of incident energy. When the transport direction is reversed, the spin conductance is suppressed strongly. Such a remarkable difference arises from spin-flipped transitions caused by the spin-orbit interaction. ; Comment: 3 pages, 2 figures