1. Role of matrix elements in the time-resolved photoemission signal.
- Author
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F Boschini, D Bugini, M Zonno, M Michiardi, R P Day, E Razzoli, B Zwartsenberg, M Schneider, E H da Silva Neto, S dal Conte, S K Kushwaha, R J Cava, S Zhdanovich, A K Mills, G Levy, E Carpene, C Dallera, C Giannetti, D J Jones, and G Cerullo
- Subjects
PHOTOEMISSION ,PHOTOELECTRON spectroscopy ,TOPOLOGICAL insulators ,SOLID-state fermentation - Abstract
Time- and angle-resolved photoemission spectroscopy (TR-ARPES) provides access to the ultrafast evolution of electrons and many-body interactions in solid-state systems. However, the momentum- and energy-resolved transient photoemission intensity may not be unambiguously described by the intrinsic relaxation dynamics of photoexcited electrons alone. The interpretation of the time-dependent photoemission signal can be affected by the transient evolution of the electronic distribution, and both the one-electron removal spectral function as well as the photoemission matrix elements. Here we investigate the topological insulator Bi
1.1 Sb0.9 Te2 S to demonstrate, by means of a detailed probe-polarization dependent study, the transient contribution of matrix elements to TR-ARPES. [ABSTRACT FROM AUTHOR]- Published
- 2020
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