| Issue |
Europhys. Lett.
Volume 40, Number 4, November II 1997
|
|
|---|---|---|
| Page(s) | 423 - 428 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1997-00482-6 | |
| Published online | 01 September 2002 | |
Decoupling and melting in a layered superconductor
Department of Mathematics, Imperial College, 180 Queen's Gate,
London, SW7 2BZ, UK
Received:
21
July
1997
Accepted:
26
September
1997
We report results for a 3D simulation of a layered superconductor. The
low-temperature phase corresponds to a triangular lattice of vortex
lines. On increasing the temperature order is lost in the a-b plane,
Tab with no detectable thermodynamic signature. On further
increasing the temperature the vortex lines decouple completely at a
first-order phase transition, Tdc. The entropy associated
with the transition is dependent on the anisotropy chosen for the
system and has values of 
and 
for the
two anisotropies studied. The width 
is anisotropy
dependent and is too narrow to be measured for the more anisotropic system
studied, corresponding to sublimation of the vortices as reported
in a recent experiment by Fuchs et al.
PACS: 74.60.-w – Type-II superconductivity / 74.25.Dw – Superconductivity phase diagrams / 07.05.Tp – Computer modeling and simulation
© EDP Sciences, 1997
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