Croxall, AF;
Gupta, KD;
Nicoll, CA;
Thangaraj, M;
Beere, HE;
Farrer, I;
Ritchie, DA;
(2008)
Anomalous Coulomb Drag in Electron-Hole Bilayers.
PHYS REV LETT
, 101
(24)
, Article 246801. 10.1103/PhysRevLett.101.246801.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | Anomalous Coulomb Drag in Electron-Hole Bilayers |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.101.246801 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.101.246801 |
| Language: | English |
| Additional information: | © 2008 The American Physical Society |
| Keywords: | BOSE-EINSTEIN CONDENSATION, 2-DIMENSIONAL ELECTRON, SYSTEMS, EXCITONS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1311649 |
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