%0 Journal Article
%A Sefrioui, Z.
%A Arias, D.
%A Leon, C.
%A Santamaría Sánchez-Barriga, Jacobo
%A González Herrera, Elvira María
%A Vicent López, José Luis
%T Zero-magnetic-field dynamic scaling in Bi_2Sr_2CaCu_2O_8 thin films
%D 2004
%@ 1098-0121
%U https://hdl.handle.net/20.500.14352/52081
%X 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.
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