Triplet superconductivity in a model of Li0.9Mo6O17
Natalia Lera, J. V. Alvarez
DOI 10.1103/PhysRevB.92.174523 · Physical Review B
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Abstract
Superconductivity in the quasi-one-dimensional material Li0.9Mo6O17 is analyzed based on a multiorbital extended Hubbard model. We found strong charge fluctuations at two different momenta Q1 and Q2 giving rise to two different charge-ordered phases. Evaluating the superconducting vertex, we found superconductivity near strong charge fluctuations at Q1. The order parameter has p-wave symmetry with nodes on the Fermi surface. The metallic state displays a characteristic charge collective mode Q1 due to nesting and, for on-site Hubbard repulsion sufficiently large, a charge critical mode Q2 driven by Coulomb repulsion, which softens at the proximity to the transition. The results are quite robust for different coupling parametrizations. A phase diagram discussing the relevance of the model to the physics of the material is proposed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Li0.9Mo6O17 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | Pressure not reported | unknown |
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