Fermi Surface and Order Parameter Driven Vortex Lattice Structure Transitions in Twin-Free YBa2Cu3O7

J.S. White, V. Hinkov, R.W. Heslop, R.J. Lycett, E.M. Forgan, C. Bowell, S. Strässle, Asger Bech Abrahamsen, M. Laver, C.D. Dewhurst, J. Kohlbrecher, J.L. Gavilano, J. Mesot, B. Keimer, A. Erb

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    Abstract

    We report on small-angle neutron scattering studies of the intrinsic vortex lattice (VL) structure in detwinned YBa2Cu3O7 at 2 K, and in fields up to 10.8 T. Because of the suppressed pinning to twin-domain boundaries, a new distorted hexagonal VL structure phase is stabilized at intermediate fields. It is separated from a low-field hexagonal phase of different orientation and distortion by a first-order transition at 2.0(2) T that is probably driven by Fermi surface effects. We argue that another first-order transition at 6.7(2) T, into a rhombic structure with a distortion of opposite sign, marks a crossover from a regime where Fermi surface anisotropy is dominant, to one where the VL structure and distortion is controlled by the order-parameter anisotropy.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume102
    Issue number9
    Pages (from-to)097001
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2009

    Bibliographical note

    Copyright (2009) by the American Physical Society.

    Keywords

    • Materials research
    • Superconducting materials for the energy sector

    Cite this

    White, J. S., Hinkov, V., Heslop, R. W., Lycett, R. J., Forgan, E. M., Bowell, C., Strässle, S., Abrahamsen, A. B., Laver, M., Dewhurst, C. D., Kohlbrecher, J., Gavilano, J. L., Mesot, J., Keimer, B., & Erb, A. (2009). Fermi Surface and Order Parameter Driven Vortex Lattice Structure Transitions in Twin-Free YBa2Cu3O7. Physical Review Letters, 102(9), 097001. https://doi.org/10.1103/PhysRevLett.102.097001