Anharmonicity of flux lattices and thermal fluctuations in layered superconductors

1998/06/16 by T. Ruth Goldin, B. Horovitz, Baruch Horovitz · 5 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Iron-based superconductors research #Physics of Superconductivity and Magnetism #cond-mat

paper · pdf · doi:10.1103/physrevb.58.9524

published as Phys. Rev. B58, 9524 (1998) · 15 pages, 2 eps figures, Revtex, submitted to Phys. Rev. B. Sunj-class: superconductivity

arxiv created 1998/06/16 · openalex publication_date 1998/10/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We study elasticity of a perpendicular flux lattice in a layered superconductor with Josephson coupling between layers. We find that for flux displacements \ensuremathρ the energy contains \ensuremathρ²ln\ensuremathρ terms, so that elastic constants cannot be strictly defined. Instead we define effective elastic constants by a thermal average. The tilt moduli have terms \ensuremath∼lnT which for \ensuremathλ_J\ensuremath≪a, where \ensuremathλ_J is the Josephson length and a is the flux-line spacing, lead to 〈\ensuremathρ²〉\ensuremath∼T/|lnT|. The expansion parameter indicates that the dominant low-temperature phase transition is either layer decoupling at high fields (\ensuremathλ_J\ensuremath≫a) or melting at low fields (\ensuremathλ_J\ensuremath≪a).

Citations

• Possible New Vortex Matter Phases inBi2Sr2CaCu2O8
• Elastic energy of the vortex state in type II superconductors. II. Low inductions

Cited by

• Effect of the intrinsic Josephson coupling on the pancake lattice in layered superconductors
• Composite to Tilted Vortex Lattice Transition inBi2Sr2CaCu2O8+δin Oblique Fields
• Decoupling and depinning of flux lattices in disordered layered superconductors
• Decoupling transition of flux lattices in pure layered superconductors
• Crossing Lattices, Vortex Chains, and Angular Dependence of Melting Line in Layered Superconductors