Friess, B. and Dmitriev, I. A. and Umansky, V and Pfeiffer, L. and West, K. and von Klitzing, K. and Smet, J. H. (2020) Acoustoelectric Study of Microwave-Induced Current Domains. PHYSICAL REVIEW LETTERS, 124 (11): 117601. ISSN 0031-9007, 1079-7114
Full text not available from this repository.Abstract
Surface acoustic waves (SAW) have been utilized to investigate the properties of a two-dimensional electron system subjected to a perpendicular magnetic field and monochromatic microwave radiation in the regime where the so-called microwave-induced zero-resistance states form. Contrary to conventional magnetotransport in Hall bar and van der Pauw geometries, the collimated SAW beam probes only the bulk of the electronic system exposed to this wave. Clear signatures appear in the SAW propagation velocity, corroborating that neither contacts nor sample edges are a root source for their emergence. By virtue of the directional nature of this probing method and with the assistance of theoretical modeling, we were able to demonstrate that the SAW response depends on the angle between its propagation vector and the orientation of domains that spontaneously form when zero-resistance is observed in transport. This confirms in unprecedented manner the formation of an inhomogeneous phase under these nonequilibrium conditions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SURFACE ACOUSTIC-WAVES; STATES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Mar 2021 08:22 |
| Last Modified: | 29 Mar 2021 08:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/44929 |
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