Scattering makes a difference in circular dichroic angle-resolved photoemission
Physical review. B./Physical review. B, vol. 111
Abstract
Recent years have witnessed a steady progress towards blending two-dimensional quantum materials into technology, with future applications often rooted in the electronic structure. Since crossings and inversions of electronic bands with different orbital characters determine intrinsic quantum transport properties, knowledge of the orbital character is essential. Here, we benchmark angle-resolved photoelectron emission spectroscopy (ARPES) as a tool to experimentally derive orbital characters. For this purpose we study the valence electronic structure of two technologically relevant quantum materials, graphene and WSe 2 , and focus on circular dichroism that is believed to provide sensitivity to the orbital angular momentum. We analyze the contributions related to angular atomic photoionization profiles, interatomic interference, and multiple scattering. Regimes in which initial-state properties could be disentangled from the ARPES maps are critically discussed and the potential of using circular dichroic ARPES as a tool to investigate the spin polarization of initial bands is explored. For the purpose of generalization, results from two additional materials, GdMn 6 Sn 6 and PtTe 2 , are presented in addition. This research demonstrates rich complexity of the underlying physics of circular dichroic ARPES, providing insights that will shape the interpretation of both past and future circular-dichroic ARPES studies.
Authors 19
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Honey Boban Aachen
Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University
Affiliation as printed
Forschungszentrum Jülich GmbH
Jülich-Aachen Research Alliance
RWTH Aachen University
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Affiliation as printed
Forschungszentrum Jülich GmbH
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Xiao Xia Hou Aachen
Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University
Affiliation as printed
Forschungszentrum Jülich GmbH
Jülich-Aachen Research Alliance
RWTH Aachen University
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SOLARIS National Synchrotron Radiation Centre
Affiliation as printed
National Synchrotron Radiation Centre SOLARIS
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SOLARIS National Synchrotron Radiation Centre
Affiliation as printed
National Synchrotron Radiation Centre SOLARIS
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SOLARIS National Synchrotron Radiation Centre
Affiliation as printed
National Synchrotron Radiation Centre SOLARIS
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Affiliation as printed
Forschungszentrum Jülich GmbH
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Affiliation as printed
Forschungszentrum Jülich GmbH
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Affiliation as printed
Forschungszentrum Jülich GmbH
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Forschungszentrum Jülich · Johannes Gutenberg University Mainz
Affiliation as printed
Forschungszentrum Jülich
Johannes Gutenberg University Mainz
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Affiliation as printed
Heinz Maier-Leibnitz Zentrum
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Affiliation as printed
Heinz Maier-Leibnitz Zentrum
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Jose Martinez‐Castro Aachen
Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University
Affiliation as printed
Forschungszentrum Jülich
Jülich-Aachen Research Alliance
RWTH Aachen University
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Markus Ternes Aachen
Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University
Affiliation as printed
Forschungszentrum Jülich
Jülich-Aachen Research Alliance
RWTH Aachen University
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Frank Stefan Tautz Aachen
Forschungszentrum Jülich · RWTH Aachen University
Affiliation as printed
Forschungszentrum Jülich
RWTH Aachen University
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Affiliation as printed
Forschungszentrum Jülich
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Forschungszentrum Jülich · University of Duisburg-Essen · University of California, Davis
Affiliation as printed
Forschungszentrum Jülich GmbH
University of California, Davis
Universität Duisburg-Essen
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Martin Luther University Halle-Wittenberg
Affiliation as printed
Martin-Luther-Universität Halle-Wittenberg
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Łukasz Pluciński Aachen
Forschungszentrum Jülich · RWTH Aachen University
Affiliation as printed
Forschungszentrum Jülich GmbH
RWTH Aachen University
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