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arxiv 2003.07117 v1 pith:K5XCBDCT submitted 2020-03-16 physics.optics cond-mat.mes-hall

Dynamical symmetry of strongly light-driven electronic system in crystalline solids

classification physics.optics cond-mat.mes-hall
keywords statefloquetlightsymmetrybeendemonstratedynamicalelectronic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The Floquet state, which is a periodically and intensely light driven quantum state in solids, has been attracting attention as a novel state that is coherently controllable on an ultrafast time scale. An important issue has been to demonstrate experimentally novel electronic properties in the Floquet state. One technique to demonstrate them is the light scattering spectroscopy, which offers an important clue to clarifying the symmetries and energy structures of the states through symmetry analysis of the polarization selection rules. Here, we determine circular and linear polarization selection rules of light scattering in a mid-infrared-driven Floquet system in monolayer MoS2 and provide a comprehensive understanding in terms of the "dynamical symmetry" of the Floquet state.

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