This study establishes the identity of the topological phases that emerge in the Josephson medium of granular high-temperature superconductors YBa2Cu3O7–δ in the process of the Berezinskii–Kosterlitz–Thouless (BKT) phase transitions, under the influence of an external magnetic field and transport current. The nature of the topological phases arising as a result of the BKT phase transition was found to be independent of the type of external effect.

中文翻译：

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磁场和电场作用下粒状高温超导体约瑟夫森介质中的别列津斯基-科斯特利茨-Thouless拓扑相变

本研究确定了在外磁场和输运的影响下，在别列津斯基-科斯特利茨-Thouless (BKT) 相变过程中颗粒状高温超导体 YBa2Cu3O7-δ 的约瑟夫森介质中出现的拓扑相的同一性当前的。发现由于 BKT 相变而产生的拓扑相的性质与外部效应的类型无关。