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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/2341

Title: Kosterlitz-Thouless transition and fluctuation effects in YBa2Cu3O7−x thin films
Authors: Chaudhary, Sujeet
Gogia, Balvinder
Singh, Kanwal Jeet
Kashyap, S C
Pandya, D K
Chopra, K L
Keywords: YBCO thin films
vortex-antivortex pairs
kosterlitz-thouless transition
aslamazov-larkin
quasi bi-dimensional
Issue Date: 1994
Citation: Physica C: Superconductivity, 235-240, 2687-2688p.
Abstract: Fluctuation effects and temperature dependance of IV characteristics of c-axis oriented YBCO thin films on STO(100) have been investigated within the context of unbinding of vortex-antivortex pairs in the Kosterlitz-Thouless transition (KT) and Aslamazov-Larkin (AL) model. A critical jump in the nonlinearity parameter, α (V=Iα), is found at the universal value of α = 3. The broadening of the jump in the temperature dependance of α and associated exponential inverse square root temperature dependance of resistivity above Tc indicate quasi bi-dimensional behavior in the YBCO system. The correlation between AL fluctuations and phase fluctuations (KT model) has also been studied.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/2341
Appears in Collections:Physics

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