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Many‐Body Effects for Bound States in the Quasi‐One‐Dimensional Electron Gas: Effects of the Valley Degeneracy
Author(s) -
Calmels L.,
Gold A.
Publication year - 1998
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/(sici)1521-3951(199812)210:2<609::aid-pssb609>3.0.co;2-h
Subject(s) - degeneracy (biology) , fermi gas , random phase approximation , electron , physics , condensed matter physics , impurity , gas phase , function (biology) , binding energy , atomic physics , quantum mechanics , thermodynamics , bioinformatics , evolutionary biology , biology
We study the effects of screening on the binding energy of positively and negatively charged impurities in the quasi‐one‐dimensional electron gas. We assume a parabolic confinement for the electron gas. Many‐body effects beyond the random‐phase approximation and the valley degeneracy are taken into account in the screening function. Our results should apply to Si/Si 1— x Ge iix quantum wires.