Hoegl, Petra and Frank, Tobias and Kochan, Denis and Gmitra, Martin and Fabian, Jaroslav (2020) Chiral Majorana fermions in graphene from proximity-induced superconductivity. PHYSICAL REVIEW B, 101 (24): 245441. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
We present a detailed theoretical study of chiral topological superconductor phases in proximity-superconducting graphene systems based on an effective model inspired by density functional theory simulations. Inducing s-wave superconductivity in quantum anomalous Hall effect systems leads to chiral topological superconductors. For out-of-plane magnetization we find topological superconducting phases with even numbers of chiral Majorana fermions per edge, which is correlated with the opening of a nontrivial gap in the bulk system in the K points and their connection under particle-hole symmetry. We show that in a quantum anomalous Hall insulator with in-plane magnetization and a nontrivial gap opening at M, the corresponding topological superconductor can be tuned to host only single chiral Majorana states at its edge, which is promising for proposals exploiting such states for braiding operations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM; VORTICES; MODES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 22 Mar 2021 05:42 |
| Last Modified: | 22 Mar 2021 05:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/44343 |
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