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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2312.07310 |
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| _version_ | 1866917728450772992 |
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| author | Šoškić, Božidar N. Bekaert, Jonas Sevik, Cem Šljivančanin, Željko Milošević, Milorad V. |
| author_facet | Šoškić, Božidar N. Bekaert, Jonas Sevik, Cem Šljivančanin, Željko Milošević, Milorad V. |
| contents | We explore the emergence of phonon-mediated superconductivity in bilayer borophenes by controlled intercalation with elements from the groups of alkali, alkaline-earth, and transition metals, using systematic first-principles and Eliashberg calculations. We show that the superconducting properties are primarily governed by the interplay between the out-of-plane ($p_{z}$) boron states and the partially occupied in-plane ($s+p_{x,y}$) bonding states at the Fermi level. Our Eliashberg calculations indicate that intercalation with alkaline-earth elements leads to the highest superconducting critical temperatures ($T_{c}$). Specifically, Be in $δ_{4}$, Mg in $χ_{3}$, and Ca in the kagome bilayer borophene demonstrate superior performance with $T_{c}$ reaching up to 58~K. Our study therefore reveals that intercalated bilayer borophene phases are not only more resilient to chemical deterioration, but also harbor enhanced $T_{c}$ values compared to their monolayer counterparts, underscoring their substantial potential for the development of boron-based two-dimensional superconductors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_07310 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | First-principles exploration of superconductivity in intercalated bilayer borophene phases Šoškić, Božidar N. Bekaert, Jonas Sevik, Cem Šljivančanin, Željko Milošević, Milorad V. Superconductivity Materials Science We explore the emergence of phonon-mediated superconductivity in bilayer borophenes by controlled intercalation with elements from the groups of alkali, alkaline-earth, and transition metals, using systematic first-principles and Eliashberg calculations. We show that the superconducting properties are primarily governed by the interplay between the out-of-plane ($p_{z}$) boron states and the partially occupied in-plane ($s+p_{x,y}$) bonding states at the Fermi level. Our Eliashberg calculations indicate that intercalation with alkaline-earth elements leads to the highest superconducting critical temperatures ($T_{c}$). Specifically, Be in $δ_{4}$, Mg in $χ_{3}$, and Ca in the kagome bilayer borophene demonstrate superior performance with $T_{c}$ reaching up to 58~K. Our study therefore reveals that intercalated bilayer borophene phases are not only more resilient to chemical deterioration, but also harbor enhanced $T_{c}$ values compared to their monolayer counterparts, underscoring their substantial potential for the development of boron-based two-dimensional superconductors. |
| title | First-principles exploration of superconductivity in intercalated bilayer borophene phases |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2312.07310 |