Influence of Uniform Compression on the Temperature Dependence of the Pseudogap of Medium-Praseodymium-Doped Y1−x Prx Ba2 Cu3 O 7−δ Single Crystals

G. Ya Khadzhai, A. Chroneos, L. Goulatis, S. N. Kamchatnaya, A. L. Chikina, N. R. Vovk, R. V. Vovk

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
18 Downloads (Pure)

Abstract

The effect of high pressure on the conductivity in the basal plane of HTSC single crystals of Y0.77Pr0.23Ba2Cu3O7−δ is investigated. It has been established that the excess conductivity, Δσ(T), of these single crystals in a wide temperature range Tf < T < T* can be described by an exponential temperature dependence. The description of the excess conductivity using the relation Δσ ~ (1 − T/T*)exp(Δ*ab/T) can be interpreted in terms of the mean-field theory, where T* is represented as the temperature pseudogap opening, and the temperature dependence of the pseudogap (PG) is satisfactorily described in the framework of the BCS-BEC crossover theory. An increase in the applied pressure leads to the effect of narrowing the temperature interval for the realization of the PG-regime, thereby expanding the region of the linear dependence ρ(T) in the ab-plane.

Original languageEnglish
Pages (from-to)430–436
Number of pages7
JournalJournal of Low Temperature Physics
Volume203
Early online date28 Apr 2021
DOIs
Publication statusPublished - Jun 2021

Bibliographical note

Publisher Copyright:
© 2021, The Author(s).

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

  • Crossover
  • Excess conductivity
  • Hydrostatic pressure
  • Pseudogap state
  • Substitution with praseodymium
  • YBaCuO single crystals

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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