Influence of Uniform Compression on the Temperature Dependence of the Pseudogap of Medium-Praseodymium-Doped Y1?xPrxBa2Cu3O7?? Single Crystals

Abstract The effect of high pressure on the conductivity in basal plane HTSC single crystals Y 0.77 Pr 0.23 Ba 2 Cu 3 O 7? ? is investigated. It has been established that excess conductivity, ?? ( T ), these a wide temperature range f < T* can be described by an exponential dependence. description using relation ~ 1 ? T/T* )exp( ?* ab / ) interpreted terms mean-field theory, where * represented as pseudogap opening, and dependence (PG) satisfactorily framework BCS-BEC crossover theory. An increase applied leads to narrowing interval for realization PG-regime, thereby expanding region linear ? -plane.