| Autor: |
Thaís V, Trevisan, Pablo Villar, Arribi, Olle, Heinonen, Robert-Jan, Slager, Peter P, Orth |
| Rok vydání: |
2021 |
| Zdroj: |
Physical review letters. 128(6) |
| ISSN: |
1079-7114 |
| Popis: |
We show that bicircular light (BCL) is a versatile way to control magnetic symmetries and topology in materials. The electric field of BCL, which is a superposition of two circularly polarized light waves with frequencies that are integer multiples of each other, traces out a rose pattern in the polarization plane that can be chosen to break selective symmetries, including spatial inversion. Using a realistic low-energy model, we theoretically demonstrate that the three-dimensional Dirac semimetal Cd_{3}As_{2} is a promising platform for BCL Floquet engineering. Without strain, BCL irradiation induces a transition to a noncentrosymmetric magnetic Weyl semimetal phase with tunable energy separation between the Weyl nodes. In the presence of strain, we predict the emergence of a magnetic topological crystalline insulator with exotic unpinned surface Dirac states that are protected by a combination of twofold rotation and time reversal (2^{'}) and can be controlled by light. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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