The vortex core excitation spectrum in gapped topological d-wave superconductors

Baruch Rosenstein, Irina Shapiro, Boris Y. Shapiro

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

There are indications that some high temperature unconventional superconductors have a "complex" d-wave order parameter (with an admixture of s-wave) leading to nonzero energy gap. Since the coherence length is short and the Fermi energy is relatively small the quasiclassical approach is inapplicable and the more complicated Bogoliubov-deGennes equations should be used to investigate the excitation spectrum of such a material in a magneric field. It turns out that equations for the chiral d-wave superconductor simplify considerably and is the basis for any superconductor of that type with a sufficiently large gap. The spectrum of core excitations of the Abrikosov vortex in an anisotropic 3D sample exhibits several features. Unlike in conventional and gapless superconductors the core has a single excitation mode of order energetic gap for each value of momentum along the field. This has a large impact on thermal transport and vortex dynamics.

Original languageEnglish
Pages (from-to)289-302
Number of pages14
JournalJournal of Low Temperature Physics
Volume173
Issue number5-6
StatePublished - Dec 2013

Bibliographical note

Funding Information:
B.Y.S. and I.S. acknowledge support from the Israel Scientific Foundation.

Funding

B.Y.S. and I.S. acknowledge support from the Israel Scientific Foundation.

FundersFunder number
Israel Scientific Foundation

    Keywords

    • Chiral d-wave superconductor
    • Heat transport
    • Vortex core excitations

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