Two-step melting of the vortex solid in layered superconductors with random columnar pins

C Dasgupta, OT Valls - Physical review letters, 2003 - APS
We consider the melting of the vortex solid in highly anisotropic layered superconductors
with a small concentration of random columnar pinning centers. Using large-scale numerical …

Phase diagram of the vortex system in layered superconductors with strong columnar pinning

C Dasgupta, OT Valls - Physical Review B—Condensed Matter and Materials …, 2005 - APS
We present the results of a detailed investigation of the low-temperature properties of the
vortex system in strongly anisotropic layered superconductors with a random array of …

Melting and structure of the vortex solid in strongly anisotropic layered superconductors with random columnar pins

C Dasgupta, OT Valls - Physical Review B—Condensed Matter and Materials …, 2004 - APS
We study the melting transition of the low-temperature vortex solid in strongly anisotropic
layered superconductors with a concentration of random columnar pinning centers small …

Phase diagram of randomly pinned vortex matter in layered superconductors: Dependence on the details of the point pinning

C Dasgupta, OT Valls - Physical Review B—Condensed Matter and Materials …, 2007 - APS
We study the thermodynamic and structural properties of the superconducting vortex system
in high-temperature layered superconductors, with magnetic field normal to the layers, in the …

Phase diagram of vortex matter in layered high-temperature superconductors with random point pinning

C Dasgupta, OT Valls - Physical Review B—Condensed Matter and Materials …, 2006 - APS
We study the phase diagram of the superconducting vortex system in layered high-
temperature superconductors in the presence of a magnetic field perpendicular to the layers …

Vortex lattice melting in layered superconductors with periodic columnar pins

C Dasgupta, OT Valls - Physical review letters, 2001 - APS
The melting of the vortex lattice in highly anisotropic, layered superconductors with
commensurate, periodic columnar pins is studied in a geometry where magnetic field and …

Vortices in layered superconductors with columnar pins: A density-functional study

C Dasgupta, OT Valls - Physical Review B, 2002 - APS
We use numerical minimization of a model free energy functional to study the effects of
columnar pinning centers on the structure and thermodynamics of a system of pancake …

Nonequilibrium phase transitions of vortex matter in three-dimensional layered superconductors

QH Chen, X Hu - Physical review letters, 2003 - APS
Large-scale simulations on the three-dimensional (3D) frustrated anisotropic XY model have
been performed to study the nonequilibrium phase transitions of vortex matter in weak …

Competition between columnar pins and vortex screening: A doubly reentrant phase diagram

A Nandgaonkar, DG Kanhere, N Trivedi - Physical Review B, 2002 - APS
We study the phase diagram of flux lines in superconductors with columnar pins. Based on
numerical exact diagonalization simulations on small clusters, we get two phases of vortices …

Collective pinning of the vortex lattice by columnar defects in layered superconductors

JP Rodriguez - Physical Review B—Condensed Matter and Materials …, 2004 - APS
The mixed phase of layered superconductors with no magnetic screening is studied through
a partial duality analysis of the corresponding frustrated XY model in the presence of …