Site-selective nuclear magnetic relaxation time in a superconducting vortex state

Mitsuaki Takigawa, Masanori Ichioka, Kazushige Machida

    Research output: Contribution to journalArticlepeer-review

    44 Citations (Scopus)

    Abstract

    On the basis of the microscopic Bogoliubov-de Gennes theory, the dependence of the nuclear spin relaxation time T1 around vortices on the temperature and field is studied comparatively for both s-wave superconductor and d-wave superconductor. Reflecting low energy electronic excitations associated with the vortex core, the dependence of T1 on the site and temperature deviate from those of the zero-field case, and T1 becomes faster with approaching the vortex core. In the core region, T-11 has a new peak below the superconducting transition temperature Tc. The dependence of the overall T1(T) on the field for s-wave and d-wave superconductors is investigated and analyzed in terms of the local density of states. The NMR study by the dependence of T1 on the resonance field may be a new method to probe the spatial resolved vortex core structure in various conventional and unconventional superconductors.

    Original languageEnglish
    Pages (from-to)3943-3954
    Number of pages12
    Journaljournal of the physical society of japan
    Volume69
    Issue number12
    DOIs
    Publication statusPublished - Dec 2000

    Keywords

    • Bogoliubov-de Gennes theory
    • IMMR
    • Local density of states
    • Nuclear spin relaxation time T
    • Vortex lattice

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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