Critical Densities for the RPA Approach in Quasi-One-Dimensional Electronic Systems

Autor:	Francisco A. P. Osório, A. N. Borges, P.C.M. Machado, J. B. Borges
Rok vydání:	2002
Předmět:	Condensed matter physics Chemistry g factor Quantum wire Rectangular potential barrier Function (mathematics) Condensed Matter Physics Random phase approximation Radial distribution function Fermi gas Electronic Optical and Magnetic Materials Electronic density
Zdroj:	physica status solidi (b). 232:76-80
ISSN:	1521-3951 0370-1972
DOI:	10.1002/1521-3951(200207)232:1<76::aid-pssb76>3.0.co;2-n
Popis:	The intrasubband pair-correlation function, g(x), for a quasi-one-dimensional electron gas confined in a GaAs-Al x Ga 1-x As rectangular quantum wire within the random-phase approximation (RPA) is calculated for several values of the potential barrier height and wire width. We have studied the dependence of the pair-correlation function on the electronic density, and delimited the regions where the RPA approach gives physically acceptable results, i.e. the electronic density values where g(x) possesses positive values for small interparticle separations. The critical density increases with increasing potential barrier height or decreasing wire width.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f144fc0732b5f62a7521333290f602c7 https://doi.org/10.1002/1521-3951(200207)232:1<76::aid-pssb76>3.0.co Zobrazit plný text záznamu Plný text