Relaxation-Time Approximation for the Mobility of Electrons in Helium
- 5 September 1967
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 161 (1), 168-172
- https://doi.org/10.1103/physrev.161.168
Abstract
Kubo's theory of irreversible quantum statistics is applied to the problem of electron mobility in a hardcore gas. Without any assumptions regarding a relaxation time, the mobility is evaluated by cumulant techniques to first order in the gas density and second order in the scattering length. A momentum-dependent relaxation time appears in a natural manner, as does the criterion for validity of the classical Langevin theory.Keywords
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