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  Excited-state band structure mapping

Puppin, M., Nicholson, C. W., Monney, C., Deng, Y., Xian, R. P., Feldl, J., et al. (2022). Excited-state band structure mapping. Physical Review B, 105(7): 075417. doi:10.1103/PhysRevB.105.075417.

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 Creators:
Puppin, Michele1, 2, Author           
Nicholson, C. W.3, Author
Monney, C.3, Author
Deng, Y.4, Author
Xian, R. Patrick1, Author           
Feldl, Johannes1, Author           
Dong, Shuo1, Author           
Dominguez, A.5, 6, Author
Hübener, H.7, Author
Rubio, A.7, 8, 9, Author
Wolf, Martin1, Author           
Rettig, Laurenz1, Author           
Ernstorfer, Ralph1, 10, Author           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2Laboratoire de Spectroscopie Ultrarapide and Lausanne Centre for Ultrafast Science (LACUS), Ecole Polytechnique Federale de Lausanne, ISIC, Station 6, CH-1015 Lausanne, Switzerland, ou_persistent22              
3Department of physics and Fribourg centre for nanomaterials, University of Fribourg, Chemin du Muse 3, CH-1700 Switzerand, ou_persistent22              
4Paul Scherrer Institute, SwissFEL, 5232 Villigen PSI, Switzerland, ou_persistent22              
5Shenzhen JL Computational Science and Applied Research Institute, Shenzhen, 518131 China, ou_persistent22              
6Beijing Computational Science Research Center, Beijing 100193, China, ou_persistent22              
7Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, Luruper Chaussee 149, Geb. 99 (CFEL), 22761 Hamburg, DE, ou_1938284              
8Center for Computational Quantum Physics, Flatiron Institute, 162 5th Ave., New York, 10010 NY, USA, ou_persistent22              
9Nano-Bio Spectroscopy Group, Universidad del Pais Vasco UPV/EHU, 20018 San Sebastin, Spain, ou_persistent22              
10Institut für Optik und Atomare Physik, Technische Universitt Berlin, Straße des 17. Juni 135, 10632 Berlin, Germany, ou_persistent22              

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Free keywords: Condensed Matter, Materials Science, cond-mat.mtrl-sci
 Abstract: Angle-resolved photoelectron spectroscopy is an extremely powerful probe of materials to access the occupied electronic structure with energy and momentum resolution. However, it remains blind to those dynamic states above the Fermi level that determine technologically relevant transport properties. In this work, we extend band structure mapping into the unoccupied states and across the entire Brillouin zone by using a state-of-the-art high repetition rate, extreme ultraviolet fem- tosecond light source to probe optically excited samples. The wide-ranging applicability and power of this approach are demonstrated by measurements on the 2D semiconductor WSe2, where the energy-momentum dispersion of valence and conduction bands are observed in a single experiment. This provides a direct momentum-resolved view not only on the complete out-of-equilibrium band gap but also on its renormalization induced by electron-hole interaction and screening. Our work establishes a new benchmark for measuring the band structure of materials, with direct access to the energy-momentum dispersion of the excited-state spectral function.

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Language(s): eng - English
 Dates: 2021-08-162021-12-062021-08-072022-01-262022-02-172022-02
 Publication Status: Published in print
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2108.07099
DOI: 10.1103/PhysRevB.105.075417
 Degree: -

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Project name : FLATLAND - Electron-lattice-spin correlations and many-body phenomena in 2D semiconductors and related heterostructures
Grant ID : 682843
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

Source 1

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: 12 Volume / Issue: 105 (7) Sequence Number: 075417 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008