Melting and Dimensionality of the Vortex Lattice in Underdoped YBa2Cu3O6.60

Details Melting and Dimensionality of the Vortex Lattice in Underdoped YBa2Cu3O6.60 Melting and Dimensionality of the Vortex Lattice in Underdoped YBa2Cu3O6.60

1999-06-30

arxiv.org/abs/cond-mat/9906449v1

Physics

Condensed Matter

Superconductivity

8 pages, 4 figures, 5 postscript files

Scientific paper

10.1103/PhysRevB.61.R890

Muon spin rotation measurements of the magnetic field distribution in the vortex state of the oxygen deficient high-Tc superconductor YBa{2}Cu{3}O{6.60} reveal a vortex-lattice melting transition at much lower temperature than that in the fully oxygenated material. The transition is best described by a model in which adjacent layers of ``pancake'' vortices decouple in the liquid phase. Evidence is also found for a pinning-induced crossover from a solid 3D to quasi-2D vortex lattice, similar to that observed in the highly anisotropic superconductor Bi{2+x}Sr{2-x}CaCu{2}O{8+y}.

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