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Theory of low-energy behaviors in topological s-wave pairing superconductors

Ota, Y ; Nagai, Y ; Machida, M

Physica C: Superconductivity and its applications, 15 November 2015, Vol.518, pp.5-9 [Periódico revisado por pares]

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  • Título:
    Theory of low-energy behaviors in topological s-wave pairing superconductors
  • Autor: Ota, Y ; Nagai, Y ; Machida, M
  • Assuntos: Topological Superconductors ; Dirac-Type Dispersion ; Large-Mass Expansion ; Mixture of P- and S-Wave States ; Physics
  • É parte de: Physica C: Superconductivity and its applications, 15 November 2015, Vol.518, pp.5-9
  • Descrição: We construct a low-energy effective theory of topological -wave pairing superconductors, focusing on the mean-field model of superconductor . Our approach is second-order perturbation with respect to the inverse of the mass (i.e., large-mass expansion) in the Dirac-type electron dispersion from topological insulator . Since the Dirac-type dispersion with a large mass describes non-relativistic electrons, the large-mass expansion corresponds to a low-energy theory with respect to the original setup. We show that the effective gap function has not only a -wave-like component as the primary contribution, but also an -wave-like one as higher-order corrections. The mixture of - and -wave explains the numerical results (Nagai et al., 2014) of the non-magnetic impurity effects.
  • Idioma: Inglês

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