TY  - EJOUR
AU  - Boban, Honey
AU  - Qahosh, Mohammed
AU  - Hou, Xiao
AU  - Sobol, Tomasz
AU  - Beyer, Edyta
AU  - Szczepanik, Magdalena
AU  - Baranowski, Daniel
AU  - Mearini, Simone
AU  - Feyer, Vitaliy
AU  - Mokrousov, Yuriy
AU  - Jin, Keda
AU  - Wichmann, Tobias
AU  - Martinez-Castro, Jose
AU  - Ternes, Markus
AU  - Tautz, F. Stefan
AU  - Lüpke, Felix
AU  - Schneider, Claus M.
AU  - Henk, Jürgen
AU  - Plucinski, Lukasz
TI  - Scattering makes a difference in circular dichroic angle-resolved photoemission
IS  - arXiv:2410.19652
M1  - FZJ-2025-01783
M1  - arXiv:2410.19652
PY  - 2024
N1  - 12 pages, 7 figures
AB  - Recent years have witnessed a steady progress towards blending 2D 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 new insights that will shape the interpretation of both past and future circular-dichroic ARPES studies.
LB  - PUB:(DE-HGF)25
DO  - DOI:10.48550/arXiv.2410.19652
UR  - https://juser.fz-juelich.de/record/1039744
ER  -