Bulk vortex matter in Bi2 Sr2 CaCu2 O8+δ using Corbinol disk contacts

Y. M. Wang, M. S. Fuhrer, A. Zettl, S. Nagashima, K. Oka, Y. Nishihara

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We have studied bulk vortex properties in Bi2 Sr2 CaCu2 O8+δ (BSCCO) using transport measurements with a unique Corbino disk contact geometry. This Corbino disk contact geometry allows us to measure true bulk vortex properties free from surface barrier effects. The investigated vortex properties include current-induced vortex dissipation in the vortex liquid and vortex solid phases, vortex matter phase transition (vortex lattice melting transition), and vortex correlation along the c axis of BSCCO. No discrepancy is found between our measurements and others measurements using the conventional four-probe contact geometry, which renders vortex transport properties susceptible to the Bean-Livingston surface barrier effect. We conclude that the sample bulk vortex matter properties determine the vortex transport behaviors in BSCCO.

Original languageEnglish
Article number132507
JournalPhysical Review B
Issue number13
Publication statusPublished - 14 Dec 2005
Externally publishedYes

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