Bicircular light tuning of magnetic symmetry and topology in Dirac semimetal Cd3As2
Trevisan, Thaís V.
Villar Arribi, Pablo
Iowa State University Digital Repository, Ames IA (United States)
Is Version Of
Physics and AstronomyAmes National Laboratory
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 Cd3As2 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 ð20Þ and can be controlled by light.
This article is published as Trevisan, Thaís V., Pablo Villar Arribi, Olle Heinonen, Robert-Jan Slager, and Peter P. Orth. "Bicircular light tuning of magnetic symmetry and topology in Dirac semimetal Cd3As2." Physical Review Letters 128, no. 6 (2022): 066602. DOI: 10.1103/PhysRevLett.128.066602. Copyright 2022 American Physical Society. Posted with permission. DOE Contract Number(s): AC02-07CH11358; 842901; AC02-06CH11357