Superconductivity

Meissner effect and structural inhomogeneity in HTSC YBa$_2$Cu$_3$O$_{6.92}$

L. G. Mamsurova^a, S. Yu. Gavrilkin^b, I. V. Mamsurov<sup>c

a</sup> N.N. Semenov Federal Research Center for Chemical Physics Russian Academy of Sciences, Moscow
^b P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
^c Lomonosov Moscow State University

Abstract: For optimally doped high-temperature superconductors YBa$_2$Cu$_3$O$_{6.92}$ with various degrees of structural inhomogeneity, the influence of this inhomogeneity on the manifestation of the Meissner effect is considered. The measurement results indicate that for the samples under study, for which almost identical superconducting transition $T_c\sim$ 92 K temperatures were realized, the Meissner effect values turned out to be different and correlated with the degree of structural inhomogeneity, which is also characteristic of other magnetic properties.

Keywords: superconductivity, HTSC, structural disorder, magnetic properties, $d$-wave nodes, Fermi arcs, Meissner effect.

Received: 27.09.2022
Revised: 27.09.2022
Accepted: 01.10.2022

DOI: 10.21883/FTT.2023.01.53920.486

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