Protection of Unconventional Superconductivity from Disorder
Fuente:
arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866911405242843136 |
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| author | Holbæk, Sofie Castro Christensen, Morten H. Kreisel, Andreas Andersen, Brian M. |
| author_facet | Holbæk, Sofie Castro Christensen, Morten H. Kreisel, Andreas Andersen, Brian M. |
| contents | Unconventional superconductivity is a desirable state of matter due to its potential for high transition temperatures $T_{\mathrm{c}}$ and associated favorable superconducting properties. However, the sign-changing nature of the order parameter of unconventional superconductors renders their condensates fragile to disorder, an inevitability in real materials. We uncover the generic properties of electronic band structures and associated Bloch weights able to support robust unconventional superconductivity. We demonstrate this property in several case studies of the kagome and Lieb lattices, showing how unconventional superconductors exhibit unusually weak $T_{\mathrm{c}}$ suppression by disorder, despite featuring fully compensated sign-changing order parameters. We contrast these results with those for unconventional superconductivity on the square and honeycomb lattices, which are unable to protect the condensates from disorder. Finally, we discuss material candidates for which this effect may be realized. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_20937 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Protection of Unconventional Superconductivity from Disorder Holbæk, Sofie Castro Christensen, Morten H. Kreisel, Andreas Andersen, Brian M. Superconductivity Strongly Correlated Electrons Unconventional superconductivity is a desirable state of matter due to its potential for high transition temperatures $T_{\mathrm{c}}$ and associated favorable superconducting properties. However, the sign-changing nature of the order parameter of unconventional superconductors renders their condensates fragile to disorder, an inevitability in real materials. We uncover the generic properties of electronic band structures and associated Bloch weights able to support robust unconventional superconductivity. We demonstrate this property in several case studies of the kagome and Lieb lattices, showing how unconventional superconductors exhibit unusually weak $T_{\mathrm{c}}$ suppression by disorder, despite featuring fully compensated sign-changing order parameters. We contrast these results with those for unconventional superconductivity on the square and honeycomb lattices, which are unable to protect the condensates from disorder. Finally, we discuss material candidates for which this effect may be realized. |
| title | Protection of Unconventional Superconductivity from Disorder |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.20937 |