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



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Sefrioui, Zouhair and Arias Serna, Diego and León Yebra, Carlos and Santamaría Sánchez-Barriga, Jacobo and González Herrera, Elvira María and Vicent López, José Luis and Prieto, P. (2004) Zero-magnetic-field dynamic scaling in Bi_(2)Sr_(2)CaCu_(2)O_(8) thin films. Physical review B, 70 (6). ISSN 1098-0121

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

Uncontrolled Keywords:Kosterlotz-Thouless transition; Josephson-junction arrays; 2-Dimensional superconductors; Critical-behavior; Vortex fluctuations; Phase-transitions; Quenched disorder; Coulomb gas; XY models; Superfluids.
Subjects:Sciences > Physics > Electricity
Sciences > Physics > Electronics
Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:30635
Deposited On:08 Jun 2015 08:51
Last Modified:10 Dec 2018 14:58

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