Giant room temperature interface spin Hall and inverse spin Hall effects

2015/12/31 by Lei Wang, R. J. H. Wesselink, Yi Liu +3
Physics and Astronomy · #cond-mat.mtrl-sci #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.116.196602

published as Phys. Rev. Lett. 116, 196602 (2016)

arxiv created 2016/03/20 · arxiv updated 2016/05/12

Abstract

The spin Hall angle (SHA) is a measure of the efficiency with which a transverse spin current is generated from a charge current by the spin-orbit coupling and disorder in the spin Hall effect (SHE). In a study of the SHE for a Pt|Py (Py=Ni₈₀Fe₂₀) bilayer using a first-principles scattering approach, we find a SHA that increases monotonically with temperature and is proportional to the resistivity for bulk Pt. By decomposing the room temperature SHE and inverse SHE currents into bulk and interface terms, we discover a giant interface SHA that dominates the total inverse SHE current with potentially major consequences for applications.

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