Journal
NEW JOURNAL OF PHYSICS
Volume 22, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/ab6eb1
Keywords
time- and angle-resolved photoemission spectroscopy (TR-ARPES); matrix-elements; topological insulators; ultrafast electron dynamics
Categories
Funding
- Max Planck-UBC-UTokyo Centre for Quantum Materials
- Canada First Research Excellence Fund, Quantum Materials and Future Technologies Program
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF4779]
- Killam Steacie Memorial Fellowship
- Alfred P Sloan Steacie Memorial Fellowship
- Natural Sciences and Engineering Research Council of Canada's (NSERC's) Steacie Memorial Fellowship
- Alexander von Humboldt Fellowship
- Canada Research Chairs Program
- NSERC
- Canada Foundation for Innovation (CFI)
- British Columbia Knowledge Development Fund (BCKDF)
- CIFAR Quantum Materials Program
- Swiss National Science Foundation (SNSF) [P300P2_164649]
- MIUR through the PRIN 2015 Programme [2015C5SEJJ001]
- Universita Cattolica del Sacro Cuore [D.1, D.2.2, D.3.1]
- European Union's Horizon 2020 research and innovation programme [785219 GrapheneCore2]
- LANL Directors Postdoctoral Funding LDRD program XWVM
- US Department of Energy Office of Science, BESMSE Science of 100 Tesla programs
- Swiss National Science Foundation (SNF) [P300P2_164649] Funding Source: Swiss National Science Foundation (SNF)
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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.
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