Theory of the self-diffusion (spin diffusion) coefficient of an electron gas

S. Fujita

Physica A: Statistical Mechanics and its Applications, 1977, vol. 89, issue 1, 127-138

Abstract: The self-diffusion (spin-diffusion) coefficient D of an electron gas is investigated by means of a proper connected diagram expansion which treats a collision in a medium (rather than in vacuum) in a natural manner. By calculating real and virtual interaction processes to the order e4 (second order in interaction strength), we obtain D = 0.3597 ℏ12 e-2(kBT)54 n0-12 M-34 for a non-degenerate gas where n0 represents the density. The square-root density (n0) dependence is noteworthy. In the calculation, no cut-off limiting low momentum transfer in collision is introduced; the screening effect which is important at higher densities, is neglected.

Date: 1977
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:89:y:1977:i:1:p:127-138

DOI: 10.1016/0378-4371(77)90144-3

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