Volume 46, Number 4, May II 1999
|Page(s)||519 - 523|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Influence of a bound electron on the screening of a test charge by an electron gas
Laboratoire de Physique des Composants à Semiconducteurs,
CNRS (UMRS 5531) ENSERG - 23, rue des Martyrs, 38016 Grenoble France
Accepted: 10 March 1999
By including the contribution of a bound electron to the potential to be screened, it is shown that the screening cloud around a Coulomb charge is repelled so as to enable the formation of a persistent localized state. This result is obtained either with Thomas-Fermi or Lindhard screening, and is applied to the determination of Mott's critical density.
PACS: 71.30.+h – Metal-insulator transitions and other electronic transitions / 71.10.Ca – Electron gas, Fermi gas / 71.55.-i – Impurity and defect levels
© EDP Sciences, 1999
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