Interplay of Anisotropy and Disorder in the Doping-Dependent Melting and Glass Transitions of Vortices in Bi\(_2\)Sr\(_2\)CaCu\(_2\)O\(_{8+\delta}\)

We study the oxygen doping dependence of the equilibrium first-order melting and second-order glass transitions of vortices in Bi\(_2\)Sr\(_2\)CaCu\(_2\)O\(_{8+\delta}\). Doping affects both anisotropy and disorder. Anisotropy scaling is shown to collapse the melting lines only where thermal fluctua...

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Bibliographic Details
Published inarXiv.org
Main Authors Beidenkopf, H, Verdene, T, Myasoedov, Y, Shtrikman, H, Zeldov, E, Rosenstein, B, D Li, Tamegai, T
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 15.04.2007
Subjects
Anisotropy
Broken symmetry
Collapse
Dependence
Doping
Glass
Melting
Scaling
Two dimensional models
Variations
Vortices
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Summary:We study the oxygen doping dependence of the equilibrium first-order melting and second-order glass transitions of vortices in Bi\(_2\)Sr\(_2\)CaCu\(_2\)O\(_{8+\delta}\). Doping affects both anisotropy and disorder. Anisotropy scaling is shown to collapse the melting lines only where thermal fluctuations are dominant. Yet, in the region where disorder breaks that scaling, the glass lines are still collapsed. A quantitative fit to melting and replica symmetry breaking lines of a 2D Ginzburg-Landau model further reveals that disorder amplitude weakens with doping, but to a lesser degree than thermal fluctuations, enhancing the relative role of disorder.
ISSN:2331-8422
DOI:10.48550/arxiv.0704.1902