COMPARATIVE MODELLING OF TRANSPORT AND CRITICAL DEPENDENCIES IN YBCO AND BSCCO-2212

This article presents an improved and fully structured comparative study of two major cuprate high-temperature superconductors, YBa2Cu3O7-δ (YBCO) and Bi2Sr2CaCu2O8+δ (BSCCO-2212), with emphasis on a reproducible Origin-based workflow for analysing transport data, the superconducting transition, and the upper critical field. The scientific purpose is twofold: first, to explain why YBCO and BSCCO-2212 behave differently because of their distinct anisotropy, oxygen sensitivity, and interlayer coupling; second, to demonstrate how these differences can be quantified through normalized resistivity curves, derivative analysis, 10-90% resistive criteria, sigmoidal fitting of the transition region, and phenomenological reconstruction of Hc2(T). Each graph, table, and equation is interpreted in physical terms rather than being presented as a purely software-generated output. The article uses representative datasets to illustrate a publication-style methodological protocol that can be directly transferred to experimental measurements. The reconstructed results consistently show a narrower transition and larger extrapolated Hc2(0) for YBCO, whereas BSCCO-2212 exhibits broader resistive transition features compatible with stronger anisotropy and greater sensitivity to structural and oxygen inhomogeneity. The manuscript is designed as an English-language, journal-style text that preserves the original scientific meaning of the source material while improving academic rigor, terminology, structure, and interpretability.

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