Origin of spontaneous broken mirror symmetry of vortex lattices in Nb

Hiroki M. Adachi, Masaki Ishikawa, Tomoya Hirano, Masanori Ichioka, Kazushige Machida

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    4 Citations (Scopus)

    Abstract

    Combining the microscopic Eilenberger theory with the first-principles band calculation, we investigate the stable flux line lattice (FLL) for a field applied to the fourfold axis, i.e., H ∥ [001] in cubic Nb. The observed FLL transformation along H c2 is almost perfectly explained without using adjustable parameter, including the tilted square, scalene triangle with broken mirror symmetry, and isosceles triangle lattices upon increasing T. We construct a minimum Fermi surface model to understand such morphologies, particularly the stability of the scalene triangle lattice attributed to the lack of mirror symmetry about the Fermi velocity maximum direction in k-space.

    Original languageEnglish
    Article number113702
    Journaljournal of the physical society of japan
    Volume80
    Issue number11
    DOIs
    Publication statusPublished - Nov 2011

    Keywords

    • Flux line lattices
    • Quasi-classical Eilenberger theory
    • Vortex lattice morphology

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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