DIRECT COULOMB AND PHONON-MEDIATED COUPLING BETWEEN SPATIALLY SEPARATED ELECTRON GASES

被引：106

作者：

TSO, HC ^{[1
]}

VASILOPOULOS, P ^{[1
]}

PEETERS, FM ^{[1
]}

机构：

[1] UNIV ANTWERP,DEPT PHYS,B-2610 ANTWERP,BELGIUM

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.68.2516

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Momentum transfer due to electron-electron interaction between two quasi-two-dimensional electron gases, whose edges are separated by a distance d, is studied at low temperatures (T). The coupling between the gases results from the direct Coulomb (screened) interaction and from the interaction mediated by virtual phonon exchange. The former has a T2 dependence and varies approximately as d-4 for large d. The latter depends very weakly on d and, combined with the former, accounts extremely well for the T and d dependences of the relaxation time as measured by Gramila et al. [Phys. Rev. Lett. 66, 1216 (1991)].

引用

页码：2516 / 2519

页数：4

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