Repositório Digital

A- A A+

Gaussian, three-dimensional-xy, and lowest-landau-level scalings in the low-field fluctuation magnetoconductivity of bi/sub 2/ sr/sub 2/ cacu/sub 2/ o/sub 8/

.

Gaussian, three-dimensional-xy, and lowest-landau-level scalings in the low-field fluctuation magnetoconductivity of bi/sub 2/ sr/sub 2/ cacu/sub 2/ o/sub 8/

Mostrar registro completo

Estatísticas

Título Gaussian, three-dimensional-xy, and lowest-landau-level scalings in the low-field fluctuation magnetoconductivity of bi/sub 2/ sr/sub 2/ cacu/sub 2/ o/sub 8/
Autor Costa, Rosangela Menegotto
Pureur Neto, Paulo
Ghivelder, Luis
Campa, J.A.
Rasines, I.
Abstract Systematic measurements of low-field fluctuation magnetoconductivity in a single crystal of Bi2Sr2CaCu2O8 are reported. Gaussian, critical, and lowest-Landau-level scalings are observed. In the Gaussian regimes, large intervals corresponding to low-dimensional fluctuations are evidenced. Far above Tc , effects of disorder produces a fluctuation spectrum characterized by a fractal topology. Decreasing the temperature, at first a homogeneous two-dimensional behavior is observed. Then, near Tc a crossover occurs to a narrow threedimensional (3D) mean-field regime. Still closer to Tc , a scaling consistent with the predictions of the full dynamic 3D-XY universality class is clearly evidenced. This genuine critical regime is destroyed upon the application of magnetic fields above a few mT. For fields above a certain limit and in large temperature intervals, fluctuation magnetoconductivity scales as predicted by the lowest-Landau-level approximation of the Ginzburg-Landau theory.
Contido em Physical review. B, Condensed matter. New York. Vol. 56, n. 17 (Nov. 1997), p. 10836-10839
Assunto Fisica da materia condensada
Magnetocondutividade
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/104212
Arquivos Descrição Formato
000152379.pdf (85.45Kb) Texto completo (inglês) Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.