Khrapai, V. S. and Ludwig, S. and Kotthaus, J. P. and Tranitz, H. P. and Wegscheider, W. (2007) Counterflow of electrons in two isolated quantum point contacts. PHYSICAL REVIEW LETTERS, 99 (9): 096803. ISSN 0031-9007,
Full text not available from this repository.Abstract
We study the interaction between two adjacent but electrically isolated quantum point contacts (QPCs). At high enough source-drain bias on one QPC, the drive QPC, we detect a finite electric current in the second, unbiased, detector QPC. The current generated at the detector QPC always flows in the opposite direction than the current of the drive QPC. The generated current is maximal, if the detector QPC is tuned to a transition region between its quantized conductance plateaus and the drive QPC is almost pinched-off. We interpret this counterflow phenomenon in terms of an asymmetric phonon-induced excitation of electrons in the leads of the detector QPC.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COULOMB DRAG; CONDUCTANCE; HETEROSTRUCTURES; DEPENDENCE; TRANSPORT; SYSTEMS; REGIME; GASES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Dec 2020 13:49 |
| Last Modified: | 01 Dec 2020 13:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/32369 |
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