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- W2292302124 abstract "Abstract We generalize the Elliott-Yafet (EY) theory of spin relaxation in metals with inversion symmetry for the case of large spin-orbit coupling (SOC). The EY theory treats the SOC to the lowest order but this approach breaks down for metals of heavy elements (such as e.g. caesium or gold), where the SOC energy is comparable to the relevant band-band separation energies. The generalized theory is presented for a four-band model system without band dispersion, where analytic formulae are attainable for arbitrary SOC for the relation between the momentum- and spin-relaxation rates. As an extended description, we also consider an empirical pseudopotential approximation where SOC is deduced from the band potential (apart from an empirical scaling constant) and the spin-relaxation rate can be obtained numerically. Both approaches recover the usual EY theory for weak SOC and give that the spin-relaxation rate approaches the momentum-relaxation rate in the limit of strong SOC. We argue that this limit is realized in gold by analyzing spin relaxation data. A calculation of the g -factor shows that the empirical Elliott-relation, which links the g -factor and spin-relaxation rate, is retained even for strong SOC." @default.
- W2292302124 created "2016-06-24" @default.
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- W2292302124 date "2016-03-04" @default.
- W2292302124 modified "2023-09-27" @default.
- W2292302124 title "The Elliott-Yafet theory of spin relaxation generalized for large spin-orbit coupling" @default.
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- W2292302124 doi "https://doi.org/10.1038/srep22706" @default.
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