Strong-coupling superconductivity in LiB2C2 trilayer films | |
Article | |
关键词: ELECTRONIC-STRUCTURE; CRYSTAL-STRUCTURE; TEMPERATURE; DISPERSION; GRAPHITE; LIBC; MGB2; | |
DOI : 10.1103/PhysRevB.101.094501 | |
来源: SCIE |
【 摘 要 】
Coupling between sigma-bonding electrons and phonons is generally very strong. To metallize sigma electrons provides a promising route to hunt for new high-T-c superconductors. Based on this picture and first-principles density functional calculation with Wannier interpolation for electronic structure and lattice dynamics, we predict that trilayer film LiB2C2 is a good candidate to realize this kind of high-T-c superconductivity. By solving the anisotropic Eliashberg equations, we find that free-standing trilayer LiB2C2 is a phonon-mediated superconductor with T-c exceeding the liquid-nitrogen temperature at ambient pressure. The transition temperature can be further raised to 125 K by applying a biaxial tensile strain.
【 授权许可】
Free