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  Floquet dynamics in light-driven solids

Nuske, M., Broers, L., Schulte, B., Jotzu, G., Sato, S., Cavalleri, A., et al. (2020). Floquet dynamics in light-driven solids.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-73A4-F Version Permalink: http://hdl.handle.net/21.11116/0000-0006-A7AD-B
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2005.10824.pdf (Preprint), 7MB
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2005.10824.pdf
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2020
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https://arxiv.org/abs/2005.10824 (Preprint)
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 Creators:
Nuske, M.1, 2, 3, Author
Broers, L.1, 2, Author
Schulte, B.4, Author              
Jotzu, G.5, Author              
Sato, S.6, 7, Author              
Cavalleri, A.5, Author              
Rubio, A.6, 8, Author              
McIver, J. W.4, Author              
Mathey, L.1, 2, 3, Author
Affiliations:
1Zentrum für Optische Quantentechnologien, Universität Hamburg, ou_persistent22              
2Institut für Laserphysik, Universität Hamburg,, ou_persistent22              
3The Hamburg Center for Ultrafast Imaging, ou_persistent22              
4Non-equilibrium Transport in Quantum Materials, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3185036              
5Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
6Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
7Center for Computational Sciences, University of Tsukuba, ou_persistent22              
8Center for Computational Quantum Physics (CCQ),Flatiron Institute, ou_persistent22              

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 Abstract: We demonstrate how the properties of light-induced electronic Floquet states in solids impact natural physical observables, such as transport properties, by capturing the environmental influence on the electrons. We include the environment as dissipative processes, such as inter-band decay and dephasing, often ignored in Floquet predictions. These dissipative processes determine the Floquet band occupations of the emergent steady state, by balancing out the optical driving force. In order to benchmark and illustrate our framework for Floquet physics in a realistic solid, we consider the light-induced Hall conductivity in graphene recently reported by J.~W.~McIver, et al., Nature Physics (2020). We show that the Hall conductivity is estimated by the Berry flux of the occupied states of the light-induced Floquet bands, in addition to the kinetic contribution given by the average band velocity. Hence, Floquet theory provides an interpretation of this Hall conductivity as a geometric-dissipative effect. We demonstrate this mechanism within a master equation formalism, and obtain good quantitative agreement with the experimentally measured Hall conductivity, underscoring the validity of this approach which establishes a broadly applicable framework for the understanding of ultrafast non-equilibrium dynamics in solids.

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Language(s): eng - English
 Dates: 2020-05-21
 Publication Status: Published online
 Pages: 16
 Publishing info: -
 Table of Contents: -
 Rev. Method: No review
 Identifiers: arXiv: 2005.10824
 Degree: -

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