Physics – Condensed Matter – Superconductivity
Scientific paper
2009-05-05
Physics
Condensed Matter
Superconductivity
Corrected version
Scientific paper
We report first principles calculations of the electronic structure and electron-phonon coupling in the non-centrosymmetric superconductor LaNiC$_2$. These show that the material is a conventional electron-phonon superconductor with intermediate coupling. There are large contributions to the coupling by two low frequency C non-bond-stretching modes, one of which has strong Kohn anomalies. Since LaNiC$_2$ lacks inversion symmetry, the pairing is of dominant s-wave type with some mixture of p-wave character. This will give exponential decay in the specific heat.
Singh David J.
Subedi Alaska
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