Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Y19: Floquet Topological Systems
8:00 AM–10:36 AM,
Friday, March 10, 2023
Room: Room 211
Sponsoring
Unit:
DCMP
Chair: Betul Pamuk, Cornell University
Abstract: Y19.00008 : Versatile Floquet Weyl semimetal phases in an anisotropic Dirac system*
9:24 AM–9:36 AM
Presenter:
Shun Okumura
(Univ. of Tokyo)
Authors:
Shun Okumura
(Univ. of Tokyo)
Aditi Mitra
(NYU)
Takashi Oka
(Univ. of Tokyo)
In this work, we study an effective model for paramagnetic Dirac semimetals hosting two spin-degenerated Dirac cones and investigate the consequence of the periodically driven system by the Floquet theory. We clarify that when the spin-orbit coupling is finite, the FWSM can be realized by splitting the Dirac points into two Weyl point pairs by circularly polarized irradiation. We also find several topological phase transitions with realignments and pair annihilations of the Weyl points by varying strength, frequency, and direction of the incident laser, which accompany the drastic changes of the anomalous Hall conductivity.
[1] T. Oka and H. Aoki, Phys. Rev. B 79, 081406(R) (2009). [2] S. Ebihara, K. Fukushima, and T. Oka, Phys. Rev. B 93, 155107 (2016).
*This work is supported by JST CREST (No. JPMJCR19T3) and JSPS KAKENHI (No. JP22K13998).
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