Wenk, Paul and Grifoni, Milena and Schliemann, John (2022) Topological transitions in two-dimensional Floquet superconductors. PHYSICAL REVIEW B, 106 (13): 134508. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
We demonstrate the occurrence of a topological phase transition induced by an effective magnetic field in a two-dimensional electron gas with spin-orbit coupling and in proximity to an s-wave superconductor. The effective, perpendicular magnetic field is generated by an in plane, off-resonant ac-magnetic field or by circularly polarized light. The conditions for entering the topological phase do not rely on fine parameter tuning: For fixed frequency, one requires a minimal amplitude of the effective field which can be evaluated analytically. In this phase, chiral edge states generally emerge for a system in stripe geometry unless the Rashba and Dresselhaus coupling have the same magnitude. In this special case, for magnetic field driving the edge states become Majorana flat bands, due to the presence of a chiral symmetry; the light irradiated system is a trivial superconductor.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM; CONDUCTANCE; ELECTRON |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group John Schliemann |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Feb 2024 11:38 |
| Last Modified: | 08 Feb 2024 11:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/57460 |
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