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  Observation of an Excitonic Mott Transition through Ultrafast Core-cum-Conduction Photoemission Spectroscopy

Dendzik, M. R., Xian, R. P., Perfetto, E., Sangalli, D., Kutnyakhov, D., Dong, S., et al. (2020). Observation of an Excitonic Mott Transition through Ultrafast Core-cum-Conduction Photoemission Spectroscopy. Physical Review Letters, 125(09): 096401. doi:10.1103/PhysRevLett.125.096401.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0006-8E13-5 Version Permalink: https://hdl.handle.net/21.11116/0000-000D-362D-5
Genre: Journal Article

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 Creators:
Dendzik, Maciej Ramon1, 2, Author           
Xian, R. Patrick1, Author           
Perfetto, Enrico3, 4, Author
Sangalli, Davide3, 5, Author
Kutnyakhov, Dmytro6, Author
Dong, Shuo1, Author           
Beaulieu, Samuel1, Author           
Pincelli, Tommaso1, Author           
Pressacco, Federico7, Author
Curcio, Davide8, Author
Agustsson, Steinn Ymir9, Author
Heber, Michael6, Author
Hauer, Jasper1, Author           
Wurth, Wilfried6, 7, Author
Brenner, Günter6, Author
Acremann, Yves10, Author
Hofmann, Philip8, Author
Wolf, Martin1, Author           
Marini, Andrea3, Author
Stefanucci, Gianluca4, 11, Author
Rettig, Laurenz1, Author           Ernstorfer, Ralph1, Author            more..
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2Department of Applied Physics, KTH Royal Institute of Technology, Electrum 229, SE-16440, Stockholm, Kista, Sweden, ou_persistent22              
3CNR-ISM, Division of Ultrafast Processes in Materials (FLASHit), Area della Ricerca di Roma 1, Via Salaria Km 29.3, I-00016 Monterotondo Scalo, Italy, ou_persistent22              
4Department of Physics, Tor Vergata University of Rome, Via della Ricerca Scienti 1, 00133 Rome, Italy, ou_persistent22              
5Department of Physics, University of Milan, via Celoria 16, I-20133 Milan, Italy, ou_persistent22              
6DESY Photon Science, Notkestr. 85, 22607 Hamburg, Germany, ou_persistent22              
7Center for Free-Electron Laser Science CFEL, Hamburg University, Luruper Chausee 149, 22761 Hamburg, Germany, ou_persistent22              
8Department of Physics and Astronomy, Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark, ou_persistent22              
9Institute of Physics, Johannes Gutenberg University Mainz, D-55128 Mainz, Germany, ou_persistent22              
10Department of Physics, Laboratory for Solid State Physics, ETH Zurich, Otto-Stern-Weg 1, 8093 Zurich, Switzerland, ou_persistent22              
11NFN, Sezione di Roma Tor Vergata, Via della Ricerca Scienti 1, 00133 Rome, Italy, ou_persistent22              

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Free keywords: Condensed Matter, Mesoscale and Nanoscale Physics, cond-mat.mes-hall, Condensed Matter, Materials Science, cond-mat.mtrl-sci, Condensed Matter, Strongly Correlated Electrons, cond-mat.str-el
 Abstract: Time-resolved soft-X-ray photoemission spectroscopy is used to simultaneously
measure the ultrafast dynamics of core-level spectral functions and excited
states upon excitation of excitons in WSe$_2$. We present a many-body
approximation for the Green's function, which excellently describes the
transient core-hole spectral function. The relative dynamics of excited-state
signal and core levels reveals a delayed core-hole renormalization due to
screening by excited quasi-free carriers, revealing an excitonic Mott
transition. These findings establish time-resolved core-level photoelectron
spectroscopy as a sensitive probe of subtle electronic many-body interactions
and an ultrafast electronic phase transition.

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Language(s): eng - English
 Dates: 2020-03-282020-06-072020-03-192020-07-242020-08-242020-08-28
 Publication Status: Issued
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2003.12925
URI: http://arxiv.org/abs/2003.12925
DOI: 10.1103/PhysRevLett.125.096401
 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 Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: 7 Volume / Issue: 125 (09) Sequence Number: 096401 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1