库仑拖拽的介观涨落

Mesoscopic fluctuations of the coulomb drag.

作者信息

Narozhny BN, Aleiner IL

机构信息

Department of Physics and Astronomy, SUNY at Stony Brook, Stony Brook, New York 11794 and Theoretische Physik III, Ruhr-Universitat Bochum, 44780 Bochum, Germany.

出版信息

Phys Rev Lett. 2000 Jun 5;84(23):5383-6. doi: 10.1103/PhysRevLett.84.5383.

DOI:10.1103/PhysRevLett.84.5383

PMID:10990949

Abstract

We consider mesoscopic fluctuations of the Coulomb drag coefficient rho(D) in the system of two separated two-dimensional electron gases. It is shown that at low temperatures sample-to-sample fluctuations of rho(D) exceed its ensemble average. It means that in such a regime the sign of rho(D) is random and the temperature dependence almost saturates, rho(D) approximately 1/sqrt[T].

摘要

我们考虑两个分离的二维电子气系统中库仑拖曳系数ρ(D)的介观涨落。结果表明，在低温下，ρ(D)的样品间涨落超过其系综平均值。这意味着在这种情况下，ρ(D)的符号是随机的，并且温度依赖性几乎饱和，ρ(D)近似为1/√T 。