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Screening of the Coulomb Potential in the Athermal Stage of Highly Excited Direct‐Gap Semiconductors
Author(s) -
Heiner E.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221590105
Subject(s) - resolvent , coulomb , excited state , observable , operator (biology) , limit (mathematics) , non equilibrium thermodynamics , physics , extension (predicate logic) , quantum mechanics , chemistry , mathematics , mathematical analysis , biochemistry , repressor , computer science , programming language , transcription factor , gene , electron
Equations for the reduced density operator are evaluated. Investigating the subdynamics of nonrelevant observables a resolvent formulation is obtained selfconsistently for the screening part of the evolution superoperator in the athermal nonequilibrium. The analysis is taken in the limit of many collisional events and corresponds to an extension fo the RPA‐result. Thereby, the short memory approximation is improved.