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Phys Rev Lett. 2012 Jul 13;109(2):026601. Epub 2012 Jul 10.

Extrinsic spin Nernst effect from first principles.

Author information

1
Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany. ktauber@mpi-halle.mpg.de

Abstract

We present an abĀ initio description of the thermal transport phenomenon called the spin Nernst effect. It refers to generation of a spin accumulation or a pure spin current transverse to an applied temperature gradient. This is similar to the intensively studied spin Hall effect described by intrinsic and extrinsic mechanisms due to an applied electric field. Analogously, several contributions are present for the spin Nernst effect. Here we investigate the extrinsic skew scattering mechanism which is dominant in the limit of dilute alloys. Our calculations are based on a fully relativistic Korringa-Kohn-Rostoker method and a solution of the linearized Boltzmann equation. As a first application, we consider a Cu host with Au, Ti, and Bi impurities.

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