Pseudogap state in slightly doped by aluminium and praseodymium YBa${}_2$Cu${}_3$O${}_{7-\delta }$ single crystals with a given topology of plane defects

Abstract

In present work the conductivity in the basis plane of YBaCuO single crystals slightly doped by Al and Pr with a pre-specified topology of twin boundaries has been investigated. The excess conductivity for the analyzed samples shows dependence like $\Delta \sigma \sim (1-T/T^{\ast })\exp ({\Delta }_{ab}^{\ast }/T)$ in wide temperature range $T_f<T<T^{\ast }$, where $T^{\ast }$ can be represents as mean field temperature of superconducting transition. The temperature dependence of pseudogap can be satisfactory described in terms of the BCS-BEC crossover theoretical model.

3 pages, 2 figures

References in corpus (1)

• Nonperturbative XY-model approach to strong coupling superconductivity in two and three dimensions

Cited by in corpus (2)

• Effect of electron irradiation and Pr doping on the charge transport in YBCO single crystals
• Annealing effects on the normal-state resistive properties of underdoped cuprates