https://doi.org/10.1140/epjs/s11734-022-00746-9
Regular Article
Dichroism in the ultrafast ARPES response and valence band orbital nature of 
1
Laboratoire de Physique des Solides, Université Paris-Saclay, CNRS, 91405, Orsay, France
2
Sorbonne Université, CNRS, IMPMC, IRD, MNHN, 75252, Paris, France
3
Synchrotron SOLEIL, 91192, Gif-sur-Yvette, France
4
CNRS, Laboratoire des Solides Irradiés, Ecole Polytechnique, Institut Polytechnique de Paris, CEA/DRF/lRAMIS, 91128, Palaiseau, France
a
jiuxiang.zhang@universite-paris-saclay.fr
k
marino.marsi@universite-paris-saclay.fr
Received:
17
May
2022
Accepted:
3
December
2022
Published online:
19
December
2022
Time-resolved ARPES gives access to the band structure and ultrafast dynamics of excited electronic states in solids. The orbital character of the bands close to the Fermi level is essential to understand the origin of several exotic phenomena in quantum materials. By performing polarization-dependent time- and angle-resolved photoemission spectroscopy and by analyzing the photoelectron yield for two different crystal orientations, we identify the orbital character of bands below and above the chemical potential for the Dirac semimetal . Our results illustrate how the control and understanding of matrix elements’ effects in time-resolved photoemission spectroscopy can be a powerful tool for the study of quantum materials.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
