Study of Balance Equations for Hot-Electron Transport in an Arbitrary Energy Band (III)

Details Study of Balance Equations for Hot-Electron Transport in an Arbitrary Energy Band (III) Study of Balance Equations for Hot-Electron Transport in an Arbitrary Energy Band (III)

1997-11-06

arxiv.org/abs/cond-mat/9711054v1

Physics

Condensed Matter

Statistical Mechanics

15 pages with 3 PS figures, RevTeX, to be published in Physica Status Solidi (b)

Scientific paper

10.1002/1521-3951(199712)204:2<7

By choosing an electron gas resting instead of drifting in the laboratory coordinate system as the initial state, the first order perturbation calculation of the previous paper (Phys. Stat. Sol. (b) 198, 785(1996)) is revised and extended to include the high order field corrections in the expression for the frictional forces and the energy transfer rates. The final expressions are formally the same as those in first order in the electric field, but the distribution functions of electrons appearing in them are defined by different expressions. The problems relative to the distribution function are discussed in detail and a new closed expression for the distribution function is obtained. The nonlinear impurity-limited resistance of a strong degenerate electron gas is computed numerically. The result calculated by using the new expression for the distribution function is quite different from that using the displaced Fermi function when the electric field is sufficiently high.

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