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  Survival of Floquet–Bloch States in the Presence of Scattering

Aeschlimann, S., Sato, S., Krause, R., Chavez Cervantes, M., de Giovannini, U., Hübener, H., et al. (2021). Survival of Floquet–Bloch States in the Presence of Scattering. Nano Letters, 21(12), 5028-5035. doi:10.1021/acs.nanolett.1c00801.

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nl1c00801_si_001.pdf (Supplementary material), 162KB
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Supporting Information: "Details about sample growth, tr-ARPES setup, Floquet and Volkov states, data analysis, and simulations"
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© The Authors. Published by American Chemical Society

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https://arxiv.org/abs/2102.12798 (Preprint)
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 Creators:
Aeschlimann, S.1, 2, 3, Author              
Sato, S.3, 4, 5, Author              
Krause, R.1, 2, 3, Author              
Chavez Cervantes, M.2, 3, Author              
de Giovannini, U.3, 4, 6, Author              
Hübener, H.3, 4, Author              
Forti, S.7, Author
Coletti, C.7, Author
Hanff, K.3, 8, 9, Author              
Rossnagel, Kai9, 10, Author
Rubio, A.3, 4, 6, 11, Author              
Gierz, I.1, Author
Affiliations:
1Institute for Experimental and Applied Physics, University of Regensburg, ou_persistent22              
2Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938295              
3Center for Free Electron Laser Science, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
5Center for Computational Sciences, University of Tsukuba, ou_persistent22              
6Nano-Bio Spectroscopy Group, Departamento de Fisica de Materiales, Universidad del País Vasco UPV/EHU, ou_persistent22              
7Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, ou_persistent22              
8Extreme Timescales, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938294              
9Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, ou_persistent22              
10Ruprecht Haensel Laboratory, Deutsches Elektronen-Synchrotron DESY, ou_persistent22              
11Center for Computational Quantum Physics (CCQ), The Flatiron Institute, ou_persistent22              

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Free keywords: Floquet−Bloch states, dissipation, time- and angle-resolved photoemission spectroscopy, time-dependent density functional theory, driven two-level system with dissipation
 Abstract: Floquet theory has spawned many exciting possibilities for electronic structure control with light, with enormous potential for future applications. The experimental demonstration in solids, however, remains largely unrealized. In particular, the influence of scattering on the formation of Floquet–Bloch states remains poorly understood. Here we combine time- and angle-resolved photoemission spectroscopy with time-dependent density functional theory and a two-level model with relaxation to investigate the survival of Floquet–Bloch states in the presence of scattering. We find that Floquet–Bloch states will be destroyed if scattering—activated by electronic excitations—prevents the Bloch electrons from following the driving field coherently. The two-level model also shows that Floquet–Bloch states reappear at high field intensities where energy exchange with the driving field dominates over energy dissipation to the bath. Our results clearly indicate the importance of long scattering times combined with strong driving fields for the successful realization of various Floquet phenomena.

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Language(s): eng - English
 Dates: 2021-05-102021-02-252021-06-032021-06-23
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.nanolett.1c00801
arXiv: 2102.12798
 Degree: -

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Title: Nano Letters
  Abbreviation : Nano Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 21 (12) Sequence Number: - Start / End Page: 5028 - 5035 Identifier: ISSN: 1530-6984
CoNE: https://pure.mpg.de/cone/journals/resource/110978984570403