Topological versus conventional superconductivity in a Weyl semimetal: A microscopic approach

Starting from a microscopic model for the particle-particle interactions in a Weyl semimetal, we analyzed the possibility for conventional as well as monopole Cooper pairing between quasiparticle excitations at the same (intra-nodal) or opposite (inter-nodal) Weyl nodes. We derived a coupled system...

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Bibliographic Details
Main Authors Muñoz, Enrique, Esparza, Juan Pablo, Braun, José, Soto-Garrido, Rodrigo
Format Journal Article
LanguageEnglish
Published 11.11.2024
Subjects
Physics - Strongly Correlated Electrons
Physics - Superconductivity
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Summary:Starting from a microscopic model for the particle-particle interactions in a Weyl semimetal, we analyzed the possibility for conventional as well as monopole Cooper pairing between quasiparticle excitations at the same (intra-nodal) or opposite (inter-nodal) Weyl nodes. We derived a coupled system of self-consistent BCS-like equations, where the angular dependence of the pairings is directly determined from the microscopic interaction symmetries. We studied the competition between conventional and monopole superconducting phases, thus obtaining explicitly the phase diagrams from the microscopic interaction model parameters. We determined the critical temperatures for both phases, and the low temperature critical behavior, including the specific heat, that we suggest as possible experimental probe for topological quantum criticality in Weyl semimetals.
DOI:10.48550/arxiv.2411.07338