Nichele, F. and Komijani, Y. and Hennel, S. and Gerl, C. and Wegscheider, W. and Reuter, D. and Wieck, A. D. and Ihn, T. and Ensslin, K. (2013) Aharonov-Bohm rings with strong spin-orbit interaction: the role of sample-specific properties. NEW JOURNAL OF PHYSICS, 15: 033029. ISSN 1367-2630,
Full text not available from this repository. (Request a copy)Abstract
We present low-temperature transport experiments on Aharonov-Bohm (AB) rings fabricated from two-dimensional hole gases in p-type GaAs/AlGaAs heterostructures. Highly visible h/e (up to 15%) and h/2e oscillations, present for different gate voltages, prove the high quality of the fabricated devices. Like in previous work, a clear beating pattern of the h/e and h/2e oscillations is present in the magnetoresistance, producing split peaks in the Fourier spectrum. The magnetoresistance evolution is presented and discussed as a function of temperature and gate voltage. It is found that sample specific properties have a pronounced influence on the observed behaviour. For example, the interference of different transverse modes or the interplay between h/e oscillations and conductance fluctuations can produce the features mentioned above. In previous work they have occasionally been interpreted as signatures of spin-orbit interaction (SOI)-induced effects. In the light of these results, the unambiguous identification of SOI-induced phase effects in AB rings remains still an open and challenging experimental task.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BERRYS PHASE; QUANTUM; OSCILLATIONS; CONDUCTANCE; LOCALIZATION; ADIABATICITY; SPECTRUM; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Apr 2020 12:53 |
| Last Modified: | 23 Apr 2020 12:53 |
| URI: | https://pred.uni-regensburg.de/id/eprint/16973 |
Actions (login required)
 |
View Item |
