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| Auteurs principaux: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| Accès en ligne: | https://arxiv.org/abs/2508.01826 |
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| _version_ | 1866918261589803008 |
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| author | Sreedhar, Sudheer Anand Staab, Matthew Chen, Mingkun Prater, Robert Shen, Zihao Conti, Giuseppina Sidilkover, Ittai Wu, Zhenghong Rotenberg, Eli Bostwick, Aaron Jozwiak, Chris Soifer, Hadas Nemsak, Slavomir Savrasov, Sergey Y. Ivanov, Vsevolod Taufour, Valentin Vishik, Inna M. |
| author_facet | Sreedhar, Sudheer Anand Staab, Matthew Chen, Mingkun Prater, Robert Shen, Zihao Conti, Giuseppina Sidilkover, Ittai Wu, Zhenghong Rotenberg, Eli Bostwick, Aaron Jozwiak, Chris Soifer, Hadas Nemsak, Slavomir Savrasov, Sergey Y. Ivanov, Vsevolod Taufour, Valentin Vishik, Inna M. |
| contents | The multiple crystalline terminations in magnetic Weyl semimetal Co$_3$Sn$_2$S$_2$ display distinct topological and trivial surface states, which have successfully been distinguished experimentally. However, a model of pure terminations is known to be inadequate because these surfaces exhibit a high degree of spatial heterogeneity and point disorder. Here we perform a spectromicroscopy study of the surface chemistry and surface electronic structure using photoemission measurements in combination with first-principles calculations of core levels. We identify an intermediate region with properties distinct from both the sulfur and tin terminations, and demonstrate that the spectral features in this region can be associated with a disordered termination with a varying density of surface tin vacancies. This work establishes heuristics for identifying variable surface disorder using photoemission, an important prerequisite to experimentally establishing the behavior of momentum-space topological surface features subject to variable surface disorder on a single cleave. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_01826 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Mesoscale variations of chemical and electronic landscape on the surface of Weyl semimetal Co$_3$Sn$_2$S$_2$ visualized by ARPES and XPS Sreedhar, Sudheer Anand Staab, Matthew Chen, Mingkun Prater, Robert Shen, Zihao Conti, Giuseppina Sidilkover, Ittai Wu, Zhenghong Rotenberg, Eli Bostwick, Aaron Jozwiak, Chris Soifer, Hadas Nemsak, Slavomir Savrasov, Sergey Y. Ivanov, Vsevolod Taufour, Valentin Vishik, Inna M. Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons The multiple crystalline terminations in magnetic Weyl semimetal Co$_3$Sn$_2$S$_2$ display distinct topological and trivial surface states, which have successfully been distinguished experimentally. However, a model of pure terminations is known to be inadequate because these surfaces exhibit a high degree of spatial heterogeneity and point disorder. Here we perform a spectromicroscopy study of the surface chemistry and surface electronic structure using photoemission measurements in combination with first-principles calculations of core levels. We identify an intermediate region with properties distinct from both the sulfur and tin terminations, and demonstrate that the spectral features in this region can be associated with a disordered termination with a varying density of surface tin vacancies. This work establishes heuristics for identifying variable surface disorder using photoemission, an important prerequisite to experimentally establishing the behavior of momentum-space topological surface features subject to variable surface disorder on a single cleave. |
| title | Mesoscale variations of chemical and electronic landscape on the surface of Weyl semimetal Co$_3$Sn$_2$S$_2$ visualized by ARPES and XPS |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2508.01826 |