High magnetic field studies of the Vortex Lattice structure in YBa2Cu3O7

Abstract

We report on small angle neutron scattering measurements of the vortex lattice in twin-free YBa2Cu3O7, extending the previously investigated maximum field of 11~T up to 16.7~T with the field applied parallel to the c axis. This is the first microscopic study of vortex matter in this region of the superconducting phase. We find the high field VL displays a rhombic structure, with a field-dependent coordination that passes through a square configuration, and which does not lock-in to a field-independent structure. The VL pinning reduces with increasing temperature, but is seen to affect the VL correlation length even above the irreversibility temperature of the lattice structure. At high field and temperature we observe a melting transition, which appears to be first order, with no detectable signal from a vortex liquid above the transition.

References in corpus (8)

• Spin dynamics in the pseudogap state of a high-temperature superconductor
• Mechanics of Individual, Isolated Vortices in a Cuprate Superconductor
• Universal observation of multiple order parameters in cuprate superconductors
• Doping dependence of the upper critical field in La_{2-x}Sr_xCuO_4 from specific heat
• Fermi surface and order parameter driven vortex lattice structure transitions in twin-free YBa2Cu3O7
• Spin density wave induced disordering of the vortex lattice in superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• Role of CuO chains in vortex core structure in YBa2Cu3O{7-delta}
• The Absence of Vortex Lattice Melting in a Conventional Superconductor

Cited by in corpus (4)

• Hall Effect in the Vortex Lattice of d-Wave Superconductors with Anisotropic Fermi surfaces
• Deviations from the extended London model at high magnetic fields in YBa${}_2$Cu${}_3$O${}_7$
• Influence of the Fermi Surface Morphology on the Magnetic Field-Driven Vortex Lattice Structure Transitions in YBa${}_2$Cu${}_3$O${}_{7-\delta }:\delta =$0, 0.15
• Adherence of the rotating vortex lattice in the noncentrosymmetric superconductor Ru${}_7$B${}_3$ to the London model