Sefrioui, Z.Arias, D.Leon, C.Santamaría Sánchez-Barriga, JacoboGonzález Herrera, Elvira MaríaVicent López, José Luis2023-06-202023-06-202004-081098-012110.1103/PhysRevB.70.064502https://hdl.handle.net/20.500.14352/52081©2004 The American Physical Society. This work was supported by MCYT MAT 2002-2642 and CAM 07N/0032/2002.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.engjournal articlehttp://dx.doi.org/10.1103/PhysRevB.70.064502https://journals.aps.orgopen access538.9537Kosterlitz-Thouless transitionJosephson-junction arrays2-Dimensional superconductorsCritical-behaviorVortex fluctuationsPhase-transitionsQuenched DisorderCoulomb gasXy ModelsSuperfluids.ElectricidadElectrónica (Física)Física de materialesFísica del estado sólido2202.03 Electricidad2211 Física del Estado Sólido