Optical Control of Slow Topological Electrons in Moir\'e Systems

Autor:	Yang, Christopher, Esin, Iliya, Lewandowski, Cyprian, Refael, Gil
Rok vydání:	2023
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. Lett. 131, 026901 (2023)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.131.026901
Popis:	Floquet moir\'e materials possess optically-induced flat-electron bands with steady-states sensitive to drive parameters. Within this regime, we show that strong interaction screening and phonon bath coupling can overcome enhanced drive-induced heating. In twisted bilayer graphene (TBG) irradiated by a terahertz-frequency continuous circularly polarized laser, the extremely slow electronic states enable the drive to control the steady state occupation of high-Berry curvature electronic states. In particular, above a critical field amplitude, high-Berry-curvature states exhibit a slow regime where they decouple from acoustic phonons, allowing the drive to control the anomalous Hall response. Our work shows that the laser-induced control of topological and transport physics in Floquet TBG are measurable using experimentally available probes. Comment: 6 pages, 4 figures + supplemental material
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2301.02248 Zobrazit plný text záznamu View this record from Arxiv