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Zero-magnetic-field dynamic scaling in Bi_2Sr_2CaCu_2O_8 thin films

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Sefrioui, Z. y Arias, D. y Leon, C. y Santamaría Sánchez-Barriga, Jacobo y González Herrera, Elvira María y Vicent López, José Luis (2004) Zero-magnetic-field dynamic scaling in Bi_2Sr_2CaCu_2O_8 thin films. Physical review B, 70 (6). ISSN 1098-0121

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URL Oficial: http://dx.doi.org/10.1103/PhysRevB.70.064502


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Resumen

We investigate the zero-magnetic-field dynamic scaling in Bi_2Sr_2CaCu_2O_8 thin films from nonlinear current-voltage (I-V) characteristics and by using the concavity criterion recently proposed by Strachan [Phys. Rev. Lett. 87, 067007 (2001)] . We find that fresh samples show a BKT-like transition with z=0.8, smaller than expected for a conventional Berezinskii-Kosterlitz- Thouless transition. The effect of sample size and finite Josephson coupling are discussed. We examine the effect of thermally-induced disorder in the oxygen sublattice finding that the BKT-like transition is suppressed by point disorder.


Tipo de documento:Artículo
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©2004 The American Physical Society.
This work was supported by MCYT MAT 2002-2642 and CAM 07N/0032/2002.

Palabras clave:Kosterlitz-Thouless transition; Josephson-junction arrays; 2-Dimensional superconductors; Critical-behavior; Vortex fluctuations; Phase-transitions; Quenched Disorder; Coulomb gas; Xy Models; Superfluids.
Materias:Ciencias > Física > Electricidad
Ciencias > Física > Electrónica
Ciencias > Física > Física de materiales
Ciencias > Física > Física del estado sólido
Código ID:43859
Depositado:19 Jul 2017 15:16
Última Modificación:10 Dic 2018 14:58

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