Theory of an inherent spin-density-wave instability due to vortices in superconductors with strong Pauli effects

Kenta M. Suzuki, Masanori Ichioka, Kazushige Machida

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    27 Citations (Scopus)

    Abstract

    A spin-density-wave (SDW) instability mechanism enhanced by vortices under fields is proposed to explain the high field and low-temperature phase in CeCoIn 5. In the vortex state strong Pauli effect and nodal gap conspire to enhance the momentum-resolved density of states over the normal state value exclusively along the nodal direction, providing a favorable nesting condition for SDW with Q=(2k F,2k F,0.5) only at high fields (H). We can consistently understand observed mysteries of the field-induced SDW confined below H c2, such as facts that Q is directed to the nodal direction independent of H, SDW diminishes under tilting field from the ab plane, and the SDW transition line in (H,T) has a positive slope.

    Original languageEnglish
    Article number140503
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume83
    Issue number14
    DOIs
    Publication statusPublished - Apr 8 2011

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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