Du, Renjun and Liu, Ming-Hao and Mohrmann, Jens and Wu, Fan and Krupke, Ralph and von Loehneysen, Hilbert and Richter, Klaus and Danneau, Romain (2018) Tuning Anti-Klein to Klein Tunneling in Bilayer Graphene. PHYSICAL REVIEW LETTERS, 121 (12): 127706. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We show that in gapped bilayer graphene, quasiparticle tunneling and the corresponding Berry phase can be controlled such that they exhibit features of single-layer graphene such as Klein tunneling. The Berry phase is detected by a high-quality Fabry-Perot interferometer based on bilayer graphene. By raising the Fermi energy of the charge carriers, we find that the Berry phase can be continuously tuned from 2 pi down to 0.68 pi in gapped bilayer graphene, in contrast to the constant Berry phase of 2 pi in pristine bilayer graphene. Particularly, we observe a Berry phase of pi, the standard value for single-layer graphene. As the Berry phase decreases, the corresponding transmission probability of charge carriers at normal incidence clearly demonstrates a transition from anti-Klein tunneling to nearly perfect Klein tunneling.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ELECTRONIC-PROPERTIES; BAND-STRUCTURE; BERRYS PHASE; CHIRALITY; GRAPHITE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 12 Dec 2019 14:00 |
| Last Modified: | 12 Dec 2019 14:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/13838 |
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