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  Direct measurement of key exciton properties: Energy, dynamics, and spatial distribution of the wave function

Dong, S., Puppin, M., Pincelli, T., Beaulieu, S., Christiansen, D., Hübener, H., et al. (2021). Direct measurement of key exciton properties: Energy, dynamics, and spatial distribution of the wave function. Natural Sciences, 1(1): e10010. doi:10.1002/ntls.10010.

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https://dx.doi.org/10.1002/ntls.10010 (Verlagsversion)
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https://arxiv.org/abs/2012.15328 (Preprint)
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https://dx.doi.org/10.1002/ntls.10017 (Ergänzendes Material)
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This Research Paper is showcased in a Highlight entitled "Disclosed: Quasiparticle properties and dynamics in real and momentum space"
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 Urheber:
Dong, S.1, Autor
Puppin, M.1, 2, Autor
Pincelli, T.1, Autor
Beaulieu, S.1, Autor
Christiansen, D.3, Autor
Hübener, H.4, 5, Autor           
Nicholson, C. W.1, 6, Autor
Xian, R. P.1, Autor
Dendzik, M.1, 7, Autor
Deng, Y.1, 8, Autor
Windsor, Y. W.1, Autor
Selig, M.3, Autor
Malic, E.9, Autor
Rubio, A.4, 5, Autor           
Knorr, A.3, Autor
Wolf, M.1, Autor
Rettig, L.1, Autor
Ernstorfer, R.1, Autor
Affiliations:
1Fritz-Haber-Institut der Max-Planck-Gesellschaft, ou_persistent22              
2Laboratoire de Spectroscopie Ultrarapide and Lausanne Centre for Ultrafast Science (LACUS), École polytechnique fédérale de Lausanne, ISIC, ou_persistent22              
3Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
5Center for Free Electron Laser Science, ou_persistent22              
6Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, ou_persistent22              
7Department of Applied Physics, KTH Royal Institute of Technology, ou_persistent22              
8SwissFEL, Paul Scherrer Institute, ou_persistent22              
9Department of Physics, Chalmers University of Technology, ou_persistent22              

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Schlagwörter: condensed matter physics, exciton physics, many-body physics, quasi-particle interactions, semiconductors, time-resolved photoemission spectroscopy
 Zusammenfassung: Excitons, Coulomb-bound electron–hole pairs, are the fundamental excitations governing the optoelectronic properties of semiconductors. Although optical signatures of excitons have been studied extensively, experimental access to the excitonic wave function itself has been elusive. Using multidimensional photoemission spectroscopy, we present a momentum-, energy-, and time-resolved perspective on excitons in the layered semiconductor WSe2. By tuning the excitation wavelength, we determine the energy–momentum signature of bright exciton formation and its difference from conventional single-particle excited states. The multidimensional data allow to retrieve fundamental exciton properties like the binding energy and the exciton–lattice coupling and to reconstruct the real-space excitonic distribution function via Fourier transform. All quantities are in excellent agreement with microscopic calculations. Our approach provides a full characterization of the exciton properties and is applicable to bright and dark excitons in semiconducting materials, heterostructures, and devices.

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Sprache(n): eng - English
 Datum: 2021-04-192020-12-302021-04-242021-06-07
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1002/ntls.10010
arXiv: 2012.15328
 Art des Abschluß: -

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Projektname : -
Grant ID : 682843
Förderprogramm : Horizon 2020 (H2020)
Förderorganisation : European Commission (EC)
Projektname : -
Grant ID : 899794
Förderprogramm : Horizon 2020 (H2020)
Förderorganisation : European Commission (EC)
Projektname : This work was funded by the Max Planck Society, the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation and the H2020-EU.1.2.1. FET Open programs (Grant Numbers: ERC-2015-CoG-682843, ERC-2015-AdG-694097, and OPTOlogic 899794), the Max Planck Society's Research Network BiGmax on Big-Data-Driven Materials-Science, and the German Research Foundation (DFG) within the Emmy Noether program (Grant Number: RE 3977/1), through SFB 951 “Hybrid Inorganic/Organic Systems for Opto-Electronics (HIOS)” (Project Number: 182087777, projects B12 and B17), the SFB/TRR 227 “Ultrafast Spin Dynamics” (projects A09 and B07), the Research Unit FOR 1700 “Atomic Wires” (project E5), and the Priority Program SPP 2244 (project 443366970). Dominik Christiansen thanks the graduate school Advanced Materials (SFB 951) for support. Samuel Beaulieu acknowledges financial support from the NSERC-Banting Postdoctoral Fellowships Program. Tommaso Pincelli acknowledges financial support from the Alexander von Humboldt Foundation. Corrections added on October 7, 2022 after first online publication: Ethic Statement was missing.
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Quelle 1

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Titel: Natural Sciences
  Kurztitel : Nat. Sci.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Weinheim : Wiley-VCH
Seiten: - Band / Heft: 1 (1) Artikelnummer: e10010 Start- / Endseite: - Identifikator: CoNE: https://pure.mpg.de/cone/journals/resource/2698-6248