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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:2207.13027 (cond-mat)
[Submitted on 26 Jul 2022 (v1), last revised 27 Jul 2022 (this version, v2)]

Title:Ultrafast Nonequilibrium Dynamics in Two-dimensional Quantum Spin-Hall Materials

Authors:Rajesh K. Malla, Dasol Kim, Dong Eon Kim, Alexis Chacón, Wilton J. M. Kort-Kamp
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Abstract:We develop the theoretical framework of nonequilibrium ultrafast photonics in monolayer quantum spin-Hall insulators supporting a multitude of topological states. In these materials, ubiquitous strong light-matter interactions in the femtosecond scale lead to non-adiabatic quantum dynamics, resulting in topology-dependent nonlinear optoelectronic transport phenomena. We investigate the mechanism driving topological Dirac fermions interacting with strong ultrashort light pulses and uncover various experimentally accessible physical quantities that encode fingerprints of the quantum material's topological electronic state from the high harmonic generated spectrum. Our work sets the theoretical cornerstones to realize the full potential of time-resolved harmonic spectroscopy for identifying topological invariants in two-dimensional quantum spin-Hall solid state systems.
Comments: 4 figures
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci)
Report number: LA-UR-22-27068
Cite as: arXiv:2207.13027 [cond-mat.mes-hall]
  (or arXiv:2207.13027v2 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.2207.13027

Submission history

From: Rajesh Malla [view email]
[v1] Tue, 26 Jul 2022 16:37:58 UTC (5,513 KB)
[v2] Wed, 27 Jul 2022 19:53:56 UTC (5,513 KB)
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