Superconductivity in Ca-intercalated bilayer silicene
Within first-principles calculations, we explore superconductivity in Ca-intercalated bilayer silicene compound, ${\mathrm{Si}}_{2}{\mathrm{CaSi}}_{2}$. This arises from the coupling of interlayer flowerlike $\mathrm{\ensuremath{\Gamma}}$-centered Fermi surface formed by the hybridization of Ca-3$d$ and Si-3${p}_{z}$ orbitals with low-energy out-of-plane vibrations enabled by silicene's buckling. The consequent large electron-phonon coupling, as evident from the Eliashberg spectral function, leads to superconductivity below 12.5 K in this two-dimensional covalent system. Our results reveal the key control parameters to achieve superconductivity in experimentally synthesizable silicon-based thin materials that can find diverse applications.
Authors
- Jisvin Sam (ORCID: https://orcid.org/0000-0001-6103-8879)
- Sudipta Dutta (ORCID: https://orcid.org/0000-0002-8944-813X)
- Sasmita Mohakud (ORCID: https://orcid.org/0000-0002-6062-1410)
- Katsunori Wakabayashi (ORCID: https://orcid.org/0000-0002-9147-9939)
Institutions
- Kwansei Gakuin University (JP)
- Indian Institute of Science Education and Research, Tirupati (IN)
- Vellore Institute of Technology University (IN)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2024-10-03
- DOI
- https://doi.org/10.1103/physrevb.110.l161401
- Citations
- 5
- Primary Topic
- Graphene research and applications
- Type
- article
- Field-Weighted Citation Impact
- 0.59
Funders
- Department of Science and Technology, Ministry of Science and Technology, India
- Japan Science and Technology Corporation
- Ministry of Education, India
- VIT University
- Ministry of Electronics and Information technology
- Japan Society for the Promotion of Science
- Science for Equity, Empowerment and Development Division