ON THE VALIDITY OF THE RELAXATION-TIME APPROXIMATION FOR SILICON IN THE REGION OF IRREVERSIBLE THERMODYNAMICS

Authors
THOMA R WESTERHOLZ KP PEIFER HJ ENGL WL
Citation
R. Thoma et al., ON THE VALIDITY OF THE RELAXATION-TIME APPROXIMATION FOR SILICON IN THE REGION OF IRREVERSIBLE THERMODYNAMICS, Semiconductor science and technology, 7(3B), 1992, pp. 328-330
Citations number
13
Journal title
Semiconductor science and technology → ACNP
ISSN journal
02681242
Volume
7
Issue
3B
Year of publication
1992
Pages
328 - 330
Database
ISI
SICI code
0268-1242(1992)7:3B<328:OTVOTR>2.0.ZU;2-R
Abstract
We discuss the modelling of macroscopic balance equations in irreversi ble thermodynamics as resulting from stationary Monte Carlo bulk simul ations for electrons. The Onsager coefficients related to these equati ons are determined from time integrals of fundamental microscopic corr elation functions. Special interest is given to the validity of the re laxation time approximation and the Wiedemann-Franz law. The simulatio n results for silicon clearly show that a high doping level (> 10(18) cm-3) is a sufficient condition for the validity of both approximation s in inhomogeneous systems.