Tunneling spin current and spin diode behavior in bilayer system

Abstract

The coherent tunneling spin current in the bilayer system with spin-orbit coupling is investigated. Based on the continuity-like equations, we discuss the definition of the tunneling current and show that the overlaps between wavefunctions for different layers contribute to the tunneling current. We study the linear response of the tunneling spin current to an in-plane electric field in the presence of nonmagnetic impurities. The tunneling spin conductivity we obtained presents a feature asymmetrical with respect to the gate voltage when the strengthes of impurity potentials are different in each layer.

Revtex, 8 pages, 5 figures

References in corpus (6)

• Dissipationless Quantum Spin Current at Room Temperature
• Spin current and polarization in impure 2D electron systems with spin-orbit coupling
• Interplay between ferromagnetism and superconductivity in tunneling currents
• Magnification of spin Hall effect in bilayer electron gas
• Understanding spin transport from the motion in SU(2)$\times$U(1) fields
• Understanding spin Hall effects from the motion in SU(2)XU(1) fields