Abstract
is a layered pentatelluride with very weak interlayer coupling, high in-plane carrier mobility, and strong electron-electron interaction. We investigate the hot carrier dynamics of by ultrafast time-resolved optical reflectivity. Our results reveal a phonon-mediated across-gap recombination and an electron-phonon scattering channel in thermalization, with timescales of few and sub-ps, respectively. In addition we find a fast relaxation right after the initial photoexcitation with a time constant of fs, possibly arising from an electron-electron scattering channel. Our findings indicate that correlated many-body effects play an important role for the transient dynamics of .
- Received 26 July 2018
- Revised 6 March 2019
DOI:https://doi.org/10.1103/PhysRevB.99.125141
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