Effect of disorder on the vortex-lattice melting transition

Abstract

We use a three dimensional stacked triangular network of Josephson junctions as a model for the study of vortex structure in the mixed state of high Tc superconductors. We show that the addition of disorder destroys the first order melting transition occurring for clean samples. The melting transition splits in two different (continuous) transitions, ocurring at temperatures Ti and Tp (>Ti). At Ti the perpendicular-to-field superconductivity is lost, and at Tp the parallel-to-field superconductivity is lost. These results agree well with recent experiments in YBaCuO.

4 pages + 2 figures

References in corpus (3)

• Phase Transitions and Vortex Line Entanglement in a Model High Temperature Superconductor
• Percolation transition of the vortex lattice and c-axis resistivity in high-temperature superconductors
• Vortex structure and resistive transitions in high-Tc superconductors

Cited by in corpus (9)

• The Phase Diagram of Disordered Vortices from London Langevin Simulations
• First-Order Melting of a Moving Vortex Lattice: Effects of Disorder
• Magnetization Jump in a Model for Flux Lattice Melting at Low Magnetic Fields
• Vortex Lattice Melting into Disentangled Liquid Followed by the 3D-2D Decoupling Transition in YBa_2Cu_4O_8 Single Crystals
• Disorder driven destruction of a phase transition in a superconductor
• Phase Transitions in a Model Anisotropic High Tc Superconductor
• Nature of the Low Field Transition in the Mixed State of High Temperature Superconductors
• The phase diagram of high-Tc's: Influence of anisotropy and disorder
• Helicity Modulus and Fluctuating Type II Superconductors: Elastic Approximation and Numerical Simulations