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  Switching of the electron-phonon interaction in 1T-VSe2 assisted by hot carriers

Majchrzak, P., Pakdel, S., Biswas, D., Jones, A. J. H., Volckaert, K., Marković, I., et al. (2021). Switching of the electron-phonon interaction in 1T-VSe2 assisted by hot carriers. Physical Review B, 103(24): L241108, pp. 1-6. doi:10.1103/PhysRevB.103.L241108.

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Majchrzak, Paulina1, Autor
Pakdel, Sahar1, Autor
Biswas, Deepnarayan1, Autor
Jones, Alfred J. H.1, Autor
Volckaert, Klara1, Autor
Marković, Igor2, Autor           
Andreatta, Federico1, Autor
Sankar, Raman1, Autor
Jozwiak, Chris1, Autor
Rotenberg, Eli1, Autor
Bostwick, Aaron1, Autor
Sanders, Charlotte E.1, Autor
Zhang, Yu1, Autor
Karras, Gabriel1, Autor
Chapman, Richard T.1, Autor
Wyatt, Adam1, Autor
Springate, Emma1, Autor
Miwa, Jill A.1, Autor
Hofmann, Philip1, Autor
King, Phil D. C.1, Autor
Lanata, Nicola1, AutorChang, Young Jun1, AutorUlstrup, Søren1, Autor mehr..
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Zusammenfassung: We apply an intense infrared laser pulse in order to perturb the electronic and vibrational states in the three-dimensional charge density wave material 1T-VSe 2. Ultrafast snapshots of the light-induced hot carrier dynamics and nonequilibrium quasiparticle spectral function are collected using time- and angle-resolved photoemission spectroscopy. The hot carrier temperature and time-dependent electronic self-energy are extracted from the time-dependent spectral function, revealing that incoherent electron-phonon interactions heat the lattice above the charge density wave critical temperature on a timescale of (200 +/- 40) fs. Density functional perturbation theory calculations establish that the presence of hot carriers alters the overall phonon dispersion and quenches efficient low-energy acoustic phonon scattering channels, which results in a new quasiequilibrium state that is experimentally observed.

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Sprache(n): eng - English
 Datum: 2021-06-162021-06-16
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000662305100005
DOI: 10.1103/PhysRevB.103.L241108
 Art des Abschluß: -

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Titel: Physical Review B
  Kurztitel : Phys. Rev. B
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Woodbury, NY : American Physical Society
Seiten: - Band / Heft: 103 (24) Artikelnummer: L241108 Start- / Endseite: 1 - 6 Identifikator: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008