Hot carrier-assisted switching of the electron-phonon interaction in 1$T$-VSe$_2$
| Autor: | Majchrzak, Paulina, Pakdel, Sahar, Biswas, Deepnarayan, Jones, Alfred J. H., Volckaert, Klara, Marković, Igor, Andreatta, Federico, Sankar, Raman, Jozwiak, Chris, Rotenberg, Eli, Bostwick, Aaron, Sanders, Charlotte E., Zhang, Yu, Karras, Gabriel, Chapman, Richard T., Wyatt, Adam, Springate, Emma, Miwa, Jill A., Hofmann, Philip, King, Phil D. C., Lanata, Nicola, Chang, Young Jun, Ulstrup, Søren |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 103, 241108 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.103.L241108 |
| Popis: | We apply an intense infrared laser pulse in order to perturb the electronic and vibrational states in the three-dimensional charge density wave material 1$T$-VSe$_2$. Ultrafast snapshots of the light-induced hot carrier dynamics and non-equilibrium 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 $(200 \pm 40)$~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 quasi-equilibrium state that is experimentally observed. Comment: 24 pages including supplemental material, 4 figures in the main text and 4 figures in the supplemental material |
| Databáze: | arXiv |
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