Anomalous Coulomb Drag in Electron-Hole Bilayers

被引：107

作者：

Croxall, A. F. ^{[1
]}

Gupta, K. Das ^{[1
]}

Nicoll, C. A. ^{[1
]}

Thangaraj, M. ^{[1
]}

Beere, H. E. ^{[1
]}

Farrer, I. ^{[1
]}

Ritchie, D. A. ^{[1
]}

Pepper, M. ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 24期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.101.246801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report Coulomb drag measurements on GaAs-AlGaAs electron-hole bilayers. The two layers are separated by a 10 or 25 nm barrier. Below T approximate to 1 K we find two features that a Fermi-liquid picture cannot explain. First, the drag on the hole layer shows an upturn, which may be followed by a downturn. Second, the effect is either absent or much weaker in the electron layer, even though the measurements are within the linear response regime. Correlated phases have been anticipated in these, but surprisingly, the experimental results appear to contradict Onsager's reciprocity theorem.

引用

页数：4

共 31 条

[1] Dipolar superfluidity in electron-hole bilayer systems [J].

Balatsky, AV ;

Joglekar, YN ;

Littlewood, PB .

PHYSICAL REVIEW LETTERS, 2004, 93 (26)

[2] BOSE-EINSTEIN CONDENSATION OF EXCITONS [J].

BLATT, JM ;

BRANDT, W ;

BOER, KW .

PHYSICAL REVIEW, 1962, 126 (05) :1691-&

[3] ON ONSAGER PRINCIPLE OF MICROSCOPIC REVERSIBILITY [J].

CASIMIR, HBG .

REVIEWS OF MODERN PHYSICS, 1945, 17 (2-3) :343-350

[4]

CROXALL AF, ARXIV08070117V1

[5] Bose-Einstein condensation of excitons in bilayer electron systems [J].

Eisenstein, JP ;

MacDonald, AH .

NATURE, 2004, 432 (7018) :691-694

[6] Negative electron drag and holelike behavior in the integer quantum Hall regime [J].

Feng, XG ;

Zelakiewicz, S ;

Noh, H ;

Ragucci, TJ ;

Gramila, TJ ;

Pfeiffer, LN ;

West, KW .

PHYSICAL REVIEW LETTERS, 1998, 81 (15) :3219-3222

[7] MUTUAL FRICTION BETWEEN PARALLEL 2-DIMENSIONAL ELECTRON-SYSTEMS [J].

GRAMILA, TJ ;

EISENSTEIN, JP ;

MACDONALD, AH ;

PFEIFFER, LN ;

WEST, KW .

PHYSICAL REVIEW LETTERS, 1991, 66 (09) :1216-1219

[8] Electron-electron scattering between closely spaced two-dimensional electron gases [J].

Hill, NPR ;

Nicholls, JT ;

Linfield, EH ;

Pepper, M ;

Ritchie, DA ;

Hu, BYK ;

Flensberg, K .

PHYSICA B-CONDENSED MATTER, 1998, 249 :868-872

[9] Prospecting for the superfluid transition in electron-hole coupled quantum wells using coulomb drag [J].

Hu, BYK .

PHYSICAL REVIEW LETTERS, 2000, 85 (04) :820-823

[10] Transport and drag in undoped electron-hole bilayers [J].

Hwang, E. H. ;

Das Sarma, S. .

PHYSICAL REVIEW B, 2008, 78 (07)

← 1 2 3 4 →