High-$T_{\rm c}$ Ag$_x$BC and Cu$_x$BC superconductors accessible via topochemical reactions
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866913954966536192 |
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| author | Gochitashvili, Daviti Tomassetti, Charlsey R. Margine, Elena R. Kolmogorov, Aleksey N. |
| author_facet | Gochitashvili, Daviti Tomassetti, Charlsey R. Margine, Elena R. Kolmogorov, Aleksey N. |
| contents | Hole-doping of covalent materials has long served as a blueprint for designing conventional high-$T_{\rm c}$ superconductors, but thermodynamic constraints severely limit the space of realizable compounds. Our ab initio results indicate that metastable Ag$_x$BC and Cu$_x$BC phases can be accessed via standard topochemical ion exchange reactions starting from Li$_x$BC precursors. Unlike all known stoichiometric layered metal borocarbides, the predicted AgBC and CuBC derivatives, comprising honeycomb layers bridged by dumbbells, are metallic rather than semiconducting. Anisotropic Migdal-Eliashberg analysis reveals that the intrinsically hole-doped AgBC possesses a unique combination of electronic and vibrational features to exhibit two-gap superconductivity above 50 K. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_14281 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High-$T_{\rm c}$ Ag$_x$BC and Cu$_x$BC superconductors accessible via topochemical reactions Gochitashvili, Daviti Tomassetti, Charlsey R. Margine, Elena R. Kolmogorov, Aleksey N. Superconductivity Computational Physics Hole-doping of covalent materials has long served as a blueprint for designing conventional high-$T_{\rm c}$ superconductors, but thermodynamic constraints severely limit the space of realizable compounds. Our ab initio results indicate that metastable Ag$_x$BC and Cu$_x$BC phases can be accessed via standard topochemical ion exchange reactions starting from Li$_x$BC precursors. Unlike all known stoichiometric layered metal borocarbides, the predicted AgBC and CuBC derivatives, comprising honeycomb layers bridged by dumbbells, are metallic rather than semiconducting. Anisotropic Migdal-Eliashberg analysis reveals that the intrinsically hole-doped AgBC possesses a unique combination of electronic and vibrational features to exhibit two-gap superconductivity above 50 K. |
| title | High-$T_{\rm c}$ Ag$_x$BC and Cu$_x$BC superconductors accessible via topochemical reactions |
| topic | Superconductivity Computational Physics |
| url | https://arxiv.org/abs/2507.14281 |