Zero-magnetic-field dynamic scaling in Bi_(2)Sr_(2)CaCu_(2)O_(8) thin films

We investigate the zero-magnetic-field dynamic scaling in Bi_(2)Sr_(2)CaCu_(2)O_(8) thin films from nonlinear currentvoltage sI-Vd characteristics and by using the concavity criterion recently proposed by Strachan et al. [Phys. Rev. Lett. 87, 067007 (2001)]. We find that fresh samples show a BKT-lik...

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Detalles Bibliográficos
Autores: Sefrioui, Zouhair, Arias Serna, Diego, León Yebra, Carlos, Santamaría Sánchez-Barriga, Jacobo, González Herrera, Elvira María, Vicent López, José Luis, Prieto, P.
Tipo de recurso: artículo
Fecha de publicación:2004
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/51425
Acceso en línea:https://hdl.handle.net/20.500.14352/51425
Access Level:acceso abierto
Palabra clave:537
538.9
Kosterlotz-Thouless transition
Josephson-junction arrays
2-Dimensional superconductors
Critical-behavior
Vortex fluctuations
Phase-transitions
Quenched disorder
Coulomb gas
XY models
Superfluids.
Electricidad
Electrónica (Física)
Física de materiales
Física del estado sólido
2202.03 Electricidad
2211 Física del Estado Sólido
Descripción
Sumario:We investigate the zero-magnetic-field dynamic scaling in Bi_(2)Sr_(2)CaCu_(2)O_(8) thin films from nonlinear currentvoltage sI-Vd characteristics and by using the concavity criterion recently proposed by Strachan et al. [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.

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