The two conduction bands of monolayer CrSBr on Au
Fuente:
arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915535169519616 |
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| author | Ghimirey, Yogal Prasad Nagireddy, Laxman Cacho, Cephise Wilson, Neil R. Watson, Matthew D. |
| author_facet | Ghimirey, Yogal Prasad Nagireddy, Laxman Cacho, Cephise Wilson, Neil R. Watson, Matthew D. |
| contents | We report the electronic structure of monolayer CrSBr exfoliated onto mica template-stripped gold substrates. Angle-resolved photoemission spectroscopy reveals charge transfer from the substrate, populating the conduction band of monolayer CrSBr, accompanied by a pronounced reduction in the quasiparticle band gap. Furthermore, we observe two separate conduction bands that exhibit a splitting at the X point. This indicates a breaking of glide-mirror symmetry, which in the bulk or in a free-standing monolayer protects the band degeneracies at the Brillouin zone boundary. Our results demonstrate that ultraflat gold substrates do more than modify carrier densities and screening: they can lift symmetry-protected degeneracies and thus fundamentally reshape the band topology of 2D materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_04925 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The two conduction bands of monolayer CrSBr on Au Ghimirey, Yogal Prasad Nagireddy, Laxman Cacho, Cephise Wilson, Neil R. Watson, Matthew D. Strongly Correlated Electrons We report the electronic structure of monolayer CrSBr exfoliated onto mica template-stripped gold substrates. Angle-resolved photoemission spectroscopy reveals charge transfer from the substrate, populating the conduction band of monolayer CrSBr, accompanied by a pronounced reduction in the quasiparticle band gap. Furthermore, we observe two separate conduction bands that exhibit a splitting at the X point. This indicates a breaking of glide-mirror symmetry, which in the bulk or in a free-standing monolayer protects the band degeneracies at the Brillouin zone boundary. Our results demonstrate that ultraflat gold substrates do more than modify carrier densities and screening: they can lift symmetry-protected degeneracies and thus fundamentally reshape the band topology of 2D materials. |
| title | The two conduction bands of monolayer CrSBr on Au |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2510.04925 |