Eroms, Jonathan and Weiss, Dieter and Boeck, J. D. and Borghs, G. and Zulicke, U. (2005) Andreev reflection at high magnetic fields: Evidence for electron and hole transport in edge states. PHYSICAL REVIEW LETTERS, 95 (10): 107001. ISSN 0031-9007,
Full text not available from this repository. (Request a copy)Abstract
We have studied magnetotransport in arrays of niobium filled grooves in an InAs/AlxGa1-xSb heterostructure. The critical field of up to 2.6 T permits one to enter the quantum Hall regime. In the superconducting state, we observe strong magnetoresistance oscillations, whose amplitude exceeds the Shubnikov-de Haas oscillations by a factor of about 2, when normalized to the background. Additionally, we find that above a geometry-dependent magnetic field value the sample in the superconducting state has a higher longitudinal resistance than in the normal state. Both observations can be explained with edge channels populated with electrons and Andreev-reflected holes.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SEMICONDUCTOR-SUPERCONDUCTOR JUNCTIONS; ENERGY-GAP STRUCTURE; JOSEPHSON-JUNCTION; QUASI-PARTICLE; OSCILLATIONS; MOTION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Apr 2021 08:04 |
| Last Modified: | 27 Apr 2021 08:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/35630 |
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