Hall Anomaly and Vortex-Lattice Melting in Superconducting Single Crystal YBa2Cu3O7-d

Abstract

Sub-nanovolt resolution longitudinal and Hall voltages are measured in an ultra pure YBa2Cu3O7-d single crystal. The Hall anomaly and the first-order vortex-lattice melting transition are observed simultaneously. Changes in the dynamic behavior of the vortex solid and liquid are correlated with features of the Hall conductivity sxy. With the magnetic field oriented at an angle from the twin-boundaries, the Hall conductivity sharply decreases toward large negative values at the vortex-lattice melting transition.

arXiv comment6 pages, 2 figures included, Postscript, to appear in Phys. Rev. Lett

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• Unusual interplay between copper-spin and vortex dynamics in slightly overdoped La{1.83}Sr{0.17}CuO{4}
• Transport anomalies and quantum criticality in electron-doped cuprate superconductors
• Resistivity, Hall effect, and anisotropic superconducting coherence lengths of HgBa${}_2$CaCu${}_2$O${}_{6+\delta }$ thin films with different morphology
• Origin of Hall Anomaly in the Mixed State
• In search for the vortex charge and the Cooper pair mass