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PGI-1 Talk: Dr. Nguyen H. Long

Development of a relativistic full-potential KKR Green function approach for spin-dependent transport

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22 Jun 2016 11:30
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PGI Lecture Hall

FZJ, IAS-1/PGI-1

Abstract:

Spin relaxation and spin transport in non-magnetic metals are a subject of intensive theoretical and experimental studies owing to the relevance of these phenomena for spintronics applications. Due to the presence of the spin-orbit coupling (SOC) in the crystal, the Bloch states present a superposition of the states with different spin character. This spin-mixing opens a channel for finite spin-flip scattering rates and spin-relaxation times due to the presence of impurities and phonons in the system. At the same time, the SOC is responsible for the spin-asymmetry of scattering of electrons off impurities, which in turn gives rise to the transverse spin current in a longitudinal electric field or a longitudinal thermal gradient.
In this talk, I will focus on the development of the relativistic KKR Green function method to simulate the spin-dependent scattering off impurities. First, the scattering probability and the relaxation time caused by the Elliott-Yafet and Dyakonov-Perel mechanism are calculated in the presence of SOC. Then, spin Hall and spin Nernst effects are investigated by employing the semi-classical Boltzmann equation.

Contact

Prof. Dr. Stefan Blügel
Phone: +49 2461 61-4249
Fax: +49 2461 61-2850
email: s.bluegel@fz-juelich.de