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.
|Number of pages||7|
|Journal||Journal of Low Temperature Physics|
|Early online date||28 Apr 2021|
|Publication status||Published - Jun 2021|
Bibliographical notePublisher Copyright:
© 2021, The Author(s).
Copyright 2021 Elsevier B.V., All rights reserved.
- 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