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

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

2008-05-08

arxiv.org/abs/0805.1106v1

Appl. Phys. Lett. 92, 102111 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 2 figures

Scientific paper

10.1063/1.2894582

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.

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