Spin-Hall Conductivity and Electric Polarization in Metallic Thin Films
Xuhui Wang, Jiang Xiao, Aurelien Manchon, Sadamichi Maekawa
TL;DR
This paper predicts that metallic thin films with interfacial spin-orbit coupling exhibit a giant spin-Hall conductivity and transverse electric polarization, even without bulk spin-orbit effects, due to surface scattering and phase shifts.
Contribution
It introduces a theoretical prediction of significant spin-Hall and electric polarization effects in metallic thin films caused by interfacial spin-orbit coupling.
Findings
Giant spin-Hall conductivity in metallic thin films
Transverse electric polarization due to spin-dependent phase shifts
Effects occur without bulk spin-orbit coupling
Abstract
We predict theoretically that, when a normal metallic thin film (without bulk spin-orbit coupling, such as Cu or Al) is sandwiched by two insulators, two prominent effects arise due to the interfacial spin-orbit coupling: a giant spin-Hall conductivity due to the surface scattering and a transverse electric polarization due to the spin-dependent phase shift in the spinor wave functions.
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