Version 1
: Received: 15 August 2023 / Approved: 15 August 2023 / Online: 16 August 2023 (09:38:46 CEST)
How to cite:
Tyagi, U.P.; Goswami, P. Time Reversal Symmetry Broken Floquet State of SMB_6 - A Strong Topological Insulator. Preprints2023, 2023081152. https://doi.org/10.20944/preprints202308.1152.v1
Tyagi, U.P.; Goswami, P. Time Reversal Symmetry Broken Floquet State of SMB_6 - A Strong Topological Insulator. Preprints 2023, 2023081152. https://doi.org/10.20944/preprints202308.1152.v1
Tyagi, U.P.; Goswami, P. Time Reversal Symmetry Broken Floquet State of SMB_6 - A Strong Topological Insulator. Preprints2023, 2023081152. https://doi.org/10.20944/preprints202308.1152.v1
APA Style
Tyagi, U.P., & Goswami, P. (2023). Time Reversal Symmetry Broken Floquet State of SMB_6 - A Strong Topological Insulator. Preprints. https://doi.org/10.20944/preprints202308.1152.v1
Chicago/Turabian Style
Tyagi, U.P. and Partha Goswami. 2023 "Time Reversal Symmetry Broken Floquet State of SMB_6 - A Strong Topological Insulator" Preprints. https://doi.org/10.20944/preprints202308.1152.v1
Abstract
We show that the compound samarium hexaboride is a strong topological insulator using the eigenvalues of the space inversion operator in the low-energy limit of the periodic Anderson model. Additionally, we assume the presence of the ferromagnetic exchange interaction (M). A Dirac cone like feature in the surface state energy spectra is observed for M equals zero in a certain parameter range. For M not equal to zero, there is no Kramers degeneracy. We have been able to show that this phase corresponds to the quantum anomalous Hall state by calculating Berry curvature and the Chern number. Using Floquet theory, we further show that the access to a novel state with broken time reversal symmetry is possible due to the normal incidence of circularly polarized optical field on the surface of the compound despite M being absent.
Keywords
Periodic Anderson model; Dirac cone; Kramers degeneracy; Quantum anomalous Hall state; Chern number; Floquet theory
Subject
Physical Sciences, Condensed Matter Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
