Stauber, T. and Gonzalez, J. and Gomez-Santos, G. (2020) Change of chirality at magic angles of twisted bilayer graphene. PHYSICAL REVIEW B, 102 (8): 081404. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We derive a simple formula for the real-space chirality of twisted bilayer graphene that can be related to the cross product of its sheet currents. This quantity shows well-defined plateaus for the first remote band as a function of the gate voltage which are approximately quantized for commensurate twist angles. The zeroth plateau corresponds to the first magic angle where a sign change occurs due to an emergent C-6 symmetry. Our observation offers a new definition of the magic angle based on a macroscopic observable which is accessible in typical transport experiments.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MOIRE BANDS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Mar 2021 13:23 |
| Last Modified: | 15 Mar 2021 13:23 |
| URI: | https://pred.uni-regensburg.de/id/eprint/43981 |
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