Possible Evidence for A Slush Vortex Phase in the Vicinity of Vortex Glass Transition in YBa$_{2}$Cu$_3$O$_{7-δ}$ Thin Films

Details Possible Evidence for A Slush Vortex Phase in the Vicinity of Vortex Glass Transition in YBa$_{2}$Cu$_3$O$_{7-δ}$ Thin Films Possible Evidence for A Slush Vortex Phase in the Vicinity of Vortex Glass Transition in YBa$_{2}$Cu$_3$O$_{7-δ}$ Thin Films

2001-01-09

arxiv.org/abs/cond-mat/0101111v2

Phys. Rev. B 64, 054507 (2001)

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures, submitted to PRL

Scientific paper

10.1103/PhysRevB.64.054507

Current-voltage $I-V$ curves have been carefully measured for YBa$_2$Cu$_3$O$_{7-\delta}$ thin films by following different thermal or field annealing procedures. Although all data can be described quite well by the vortex-glass theory, it is found that the dissipation in a small region just above the vortex-glass transition is history dependent: the dissipation in the warming up or field-increasing process is larger than that in the cooling down or field-decreasing process. We attribute this history dependent dissipation to possible existence of a slush vortex phase.

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