The in-plane (rho(ab)) and out-of-plane (rho(c)) resistivities of Bi2Sr2CaCu2O8+x films have been simultaneously measured in magnetic fields parallel to the films c axis (B less than or equal to 1 T). The rho(ab)(T,B) and rho(c)(T,B) curves are well described both above and below the zero-field critical temperature by the fluctuation theory in the Hartree approximation, using a single set of microscopic parameters for both directions. This agreement extends down to temperatures at which the dissipation is usually attributed to vortex motion. In the low-temperature region, however, both rho(ab) and p(c) exhibit a thermally activated behavior, and the I-V characteristics change from ohmic to nonohmic. We attribute this effect to the pinning-induced phase transition from a strongly fluctuating normal phase into a superconducting vortex solid phase.

Livanov, D.v., Milani, E., Balestrino, G., & Aruta, C. (1997). In-plane and out-of-plane transport properties of Bi2Sr2CaCu2O8+delta epitaxial films: Fluctuations and transition into a vortex solid state. PHYSICAL REVIEW. B, CONDENSED MATTER, 55(14), R8701-R8704.

In-plane and out-of-plane transport properties of Bi2Sr2CaCu2O8+delta epitaxial films: Fluctuations and transition into a vortex solid state

MILANI, ENRICO;BALESTRINO, GIUSEPPE;
1997

Abstract

The in-plane (rho(ab)) and out-of-plane (rho(c)) resistivities of Bi2Sr2CaCu2O8+x films have been simultaneously measured in magnetic fields parallel to the films c axis (B less than or equal to 1 T). The rho(ab)(T,B) and rho(c)(T,B) curves are well described both above and below the zero-field critical temperature by the fluctuation theory in the Hartree approximation, using a single set of microscopic parameters for both directions. This agreement extends down to temperatures at which the dissipation is usually attributed to vortex motion. In the low-temperature region, however, both rho(ab) and p(c) exhibit a thermally activated behavior, and the I-V characteristics change from ohmic to nonohmic. We attribute this effect to the pinning-induced phase transition from a strongly fluctuating normal phase into a superconducting vortex solid phase.
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Rilevanza internazionale
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Sì, ma tipo non specificato
Settore FIS/01 - Fisica Sperimentale
Settore FIS/03 - Fisica della Materia
English
Con Impact Factor ISI
HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC-FIELD; MAGNETORESISTANCE; CONDUCTIVITY; ABSENCE; ORIGIN; LIQUID; EDGE
Livanov, D.v., Milani, E., Balestrino, G., & Aruta, C. (1997). In-plane and out-of-plane transport properties of Bi2Sr2CaCu2O8+delta epitaxial films: Fluctuations and transition into a vortex solid state. PHYSICAL REVIEW. B, CONDENSED MATTER, 55(14), R8701-R8704.
Livanov, Dv; Milani, E; Balestrino, G; Aruta, C
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/51122
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