Giant fluctuations of Coulomb drag in a bilayer system

被引：45

作者：

Price, A. S.

Savchenko, A. K.

Narozhny, B. N.

Allison, G.

Ritchie, D. A.

机构：

[1] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England

[2] Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy

[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

SCIENCE | 2007年 / 316卷 / 5821期

关键词：

D O I：

10.1126/science.1139227

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The Coulomb drag in a system of two parallel layers is the result of electron-electron interaction between the layers. We have observed reproducible fluctuations of the drag, both as a function of magnetic field and electron concentration, which are a manifestation of quantum interference of electrons in the layers. At low temperatures the fluctuations exceed the average drag, giving rise to random changes of the sign of the drag. The fluctuations are found to be much larger than previously expected, and we propose a model that explains their enhancement by considering fluctuations of local electron properties.

引用

页码：99 / 102

页数：4

共 23 条

[1]

Altshuler B. L., 1991, MESOSCOPIC PHENOMENA

[2]

Altshuler B. L., 1985, ELECT ELECT INTERACT

[3]

[Anonymous], 1991, solid state physics

[4] LINEAR-RESPONSE THEORY OF COULOMB DRAG IN COUPLED ELECTRON-SYSTEMS [J].