Vortex state and field-angle resolved specific heat oscillation for H ∥ ab in d-wave superconductors

Masayuki Hiragi, Kenta M. Suzuki, Masanori Ichioka, Kazushige Machida

    Research output: Contribution to journalArticlepeer-review

    26 Citations (Scopus)

    Abstract

    When magnetic field is applied parallel to the ab-plane in d x2-y2-wave superconductors, the transition of a stable vortex lattice structure, the spatial structure of local density of states, and the specific heat oscillation induced by rotation of the magnetic field orientation are investigated by quantitative calculations based on the self-consistent Eilenberger theory. We estimate how the vortex state changes depending on the relative angle between the node direction of the superconducting gap and magnetic field orientation. To reproduce the sign change of specific heat oscillation observed in CeCoIn5, our study is perfomed by including a strong paramagnetic effect. The quantitative theoretical calculations give decisive information to analyze the experimental data on the field-angle dependence, and establish the angle-resolved specific heat experiment as a spectroscopic means to identify the node position of the superconducting gap.

    Original languageEnglish
    Article number094709
    Journaljournal of the physical society of japan
    Volume79
    Issue number9
    DOIs
    Publication statusPublished - Sep 2010

    Keywords

    • Eilenberger theory
    • Paramagnetic effect
    • Specific heat oscillation
    • Vortex state under parallel field

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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