Scattering makes a difference in circular dichroic angle-resolved photoemission
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2024
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| author | Boban, Honey Qahosh, Mohammed Hou, Xiao Sobol, Tomasz Beyer, Edyta Szczepanik, Magdalena Baranowski, Daniel Mearini, Simone Feyer, Vitaliy Mokrousov, Yuriy Jin, Keda Wichmann, Tobias Martinez-Castro, Jose Ternes, Markus Tautz, F. Stefan Lüpke, Felix Schneider, Claus M. Henk, Jürgen Plucinski, Lukasz |
| author_facet | Boban, Honey Qahosh, Mohammed Hou, Xiao Sobol, Tomasz Beyer, Edyta Szczepanik, Magdalena Baranowski, Daniel Mearini, Simone Feyer, Vitaliy Mokrousov, Yuriy Jin, Keda Wichmann, Tobias Martinez-Castro, Jose Ternes, Markus Tautz, F. Stefan Lüpke, Felix Schneider, Claus M. Henk, Jürgen Plucinski, Lukasz |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_19652 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Scattering makes a difference in circular dichroic angle-resolved photoemission Boban, Honey Qahosh, Mohammed Hou, Xiao Sobol, Tomasz Beyer, Edyta Szczepanik, Magdalena Baranowski, Daniel Mearini, Simone Feyer, Vitaliy Mokrousov, Yuriy Jin, Keda Wichmann, Tobias Martinez-Castro, Jose Ternes, Markus Tautz, F. Stefan Lüpke, Felix Schneider, Claus M. Henk, Jürgen Plucinski, Lukasz Materials Science Mesoscale and Nanoscale Physics 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. |
| title | Scattering makes a difference in circular dichroic angle-resolved photoemission |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2410.19652 |