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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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 Creators:
Majchrzak, Paulina1, Author
Pakdel, Sahar1, Author
Biswas, Deepnarayan1, Author
Jones, Alfred J. H.1, Author
Volckaert, Klara1, Author
Marković, Igor2, Author              
Andreatta, Federico1, Author
Sankar, Raman1, Author
Jozwiak, Chris1, Author
Rotenberg, Eli1, Author
Bostwick, Aaron1, Author
Sanders, Charlotte E.1, Author
Zhang, Yu1, Author
Karras, Gabriel1, Author
Chapman, Richard T.1, Author
Wyatt, Adam1, Author
Springate, Emma1, Author
Miwa, Jill A.1, Author
Hofmann, Philip1, Author
King, Phil D. C.1, Author
Lanata, Nicola1, AuthorChang, Young Jun1, AuthorUlstrup, Søren1, Author more..
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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 Abstract: 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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Language(s): eng - English
 Dates: 2021-06-162021-06-16
 Publication Status: Published in print
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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: - Volume / Issue: 103 (24) Sequence Number: L241108 Start / End Page: 1 - 6 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008