Low Temperature Physics: 47, 166 (2021); https://doi.org/10.1063/10.0003178
Fizika Nizkikh Temperatur: Volume 47, Number 2 (February 2021), p. 184-187    ( to contents , go back )

Effect of hydrostatic pressure up to 12 kbar on the electrical resistance of Y0.77Pr0.23Ba2Cu3O7–δ single crystals

G. Khadzhai, A. Matsepulin, and R. Vovk

V. N. Karazin Kharkiv National University, Kharkiv 61022, Ukraine
E-mail: gkhadjai@gmail.com;
rvvovk2017@gmail.com

pos Анотація:772

Received September 8, 2020, revised October 12, 2020, published online December 2 5, 2020

Abstract

The effect of high hydrostatic pressure up to 12 kbar on the electrical resistivity in the basal ab planeof an optimally doped Y0.77Pr0.23Ba2Cu3O7–δ single crystal were studied. An inhomogeneity of the sample is found that does not depend on the applied pressure, P. The Tc(P) dependence increases nonlinearly with increasing P, and the value of the baric derivative, dTc / dP, decreases. Possible mechanisms of the effect of high pressure on Tc are discussed, taking into account the presence of features in the electronic spectrum of charge carriers.

Key words: Y1–xPrxBa2Cu3O7–δ single crystals, doping with praseodymium, hydrostatic pressure, phase separation, baric derivatives.

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