FRIEDEL OSCILLATIONS IN THE 2-DIMENSIONAL ELECTRON-GAS IN THE LOW-DENSITY REGIME

被引：10
作者：
GOLD, A
机构：
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 1994年 / 70卷 / 03期
关键词：
D O I：
10.1080/09500839408240967
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We calculate the screened Coulomb interaction in real space for two-dimensional electron gases in a plane and in a superlattice. We include anomalous screening due to many-body effects via the local-field correction. We find that many-body effects lead to a strong attractive intraplane potential. The strong attractive part is interpreted as a many-body effect in the low-carrier-density regime. Our interpretation for a superlattice is supported by the results for a single plane. The instability of the electron gas is of Kohn-Luttinger type. For r(s) > 2 we find that the attraction is much larger than the Fermi energy which should lead to a Bose-Einstein condensation.
引用
收藏
页码：141 / 147
页数：7
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