Chiral topological superconductivity in hole-doped Sn/Si(111)
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866908714373480448 |
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| author | Bunney, Matthew Marchetti, Lucca Di Sante, Domenico Honerkamp, Carsten Rachel, Stephan |
| author_facet | Bunney, Matthew Marchetti, Lucca Di Sante, Domenico Honerkamp, Carsten Rachel, Stephan |
| contents | A third monolayer of tin atoms on the semiconductor substrate Si(111) has been shown to become superconducting upon six to ten percent hole doping. Experiments have reported promising results hinting at a superconducting chiral $d$-wave order parameter. Here we examine Sn/Si(111) by combining most recent ab initio results, quasi-particle interference calculations, state-of-the-art truncated-unity functional renormalization group simulations and Bogoliubov-de Gennes analysis. We show remarkable agreement between experimental and theoretical quasi-particle interference data both in the metallic and superconducting regimes. The interacting phase diagram reveals that the superconductivity is indeed chiral $d$-wave with Chern number $C=4$. Surprisingly, magnetically ordered phases are absent, instead we find charge density wave order, as observed in related compounds, as a competing phase. Our results demonstrate that Sn/Si(111) is an outstanding candidate material for chiral topological superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_13808 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Chiral topological superconductivity in hole-doped Sn/Si(111) Bunney, Matthew Marchetti, Lucca Di Sante, Domenico Honerkamp, Carsten Rachel, Stephan Superconductivity Strongly Correlated Electrons A third monolayer of tin atoms on the semiconductor substrate Si(111) has been shown to become superconducting upon six to ten percent hole doping. Experiments have reported promising results hinting at a superconducting chiral $d$-wave order parameter. Here we examine Sn/Si(111) by combining most recent ab initio results, quasi-particle interference calculations, state-of-the-art truncated-unity functional renormalization group simulations and Bogoliubov-de Gennes analysis. We show remarkable agreement between experimental and theoretical quasi-particle interference data both in the metallic and superconducting regimes. The interacting phase diagram reveals that the superconductivity is indeed chiral $d$-wave with Chern number $C=4$. Surprisingly, magnetically ordered phases are absent, instead we find charge density wave order, as observed in related compounds, as a competing phase. Our results demonstrate that Sn/Si(111) is an outstanding candidate material for chiral topological superconductivity. |
| title | Chiral topological superconductivity in hole-doped Sn/Si(111) |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2512.13808 |