Stallhofer, Markus and Kastl, Christoph and Braendlein, Marcel and Schuh, Dieter and Wegscheider, Werner and Kotthaus, Joerg P. and Abstreiter, Gerhard and Holleitner, Alexander W. (2012) Enlarged magnetic focusing radius of photoinduced currents in mesoscopic circuits. PHYSICAL REVIEW B, 86 (11): 115315. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We use GaAs-based quantum point contacts as mesoscopic detectors to analyze the flow of photogenerated electrons in a two-dimensional electron gas at a perpendicular magnetic field. Whereas charge transport experiments always measure the classical cyclotron radius, we show that this changes dramatically when detecting the photoinduced nonequilibrium current in magnetic fields. The radius of the photocurrent flow patterns surprisingly exceeds the classical cyclotron value by far, both in experiment and Monte Carlo simulations. We identify electron-electron scattering as the underlying reason.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 2-DIMENSIONAL ELECTRON-GAS; QUANTUM POINT-CONTACT; CYCLOTRON-RESONANCE; INVERSION LAYERS; BRANCHED FLOW; SCATTERING; MOBILITY; TRANSPORT; HETEROSTRUCTURES; INTERFERENCE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 May 2020 06:34 |
| Last Modified: | 06 May 2020 06:34 |
| URI: | https://pred.uni-regensburg.de/id/eprint/18121 |
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