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Triplet superconductivity in a model of Li0.9Mo6O17.

Authors :
Lera, Natalia
Alvarez, J. V.
Source :
Physical Review B: Condensed Matter & Materials Physics. Nov2015, Vol. 92 Issue 17, p1-8. 8p.
Publication Year :
2015

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10980121
Volume :
92
Issue :
17
Database :
Academic Search Index
Journal :
Physical Review B: Condensed Matter & Materials Physics
Publication Type :
Academic Journal
Accession number :
112011540
Full Text :
https://doi.org/10.1103/PhysRevB.92.174523