Abstract
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 Bi1.1Sb0.9Te2S to demonstrate, by means of a detailed probe-polarization dependent study, the transient contribution of matrix elements to TR-ARPES.
Funder
Laboratory Directed Research and Development
Gordon and Betty Moore Foundation
Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada
E.W.R. Steacie Memorial Fund
Canada Foundation for Innovation
Alexander von Humboldt-Stiftung
British Columbia Knowledge Development Fund
Canadian Institute for Advanced Research
Ministero dell’Istruzione, dell’Università e della Ricerca
Alfred P. Sloan Foundation
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Subject
General Physics and Astronomy
Cited by
9 articles.
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