Evolution of the pseudogap and excess conductivity of YBa${}_2$Cu${}_3$O${}_{7-\hat{I}´}$ single crystals in the course of long-term aging

A. L. Solovjov, L. V. Bludova, M. V. Shytov +3

The temperature dependences of both fluctuation conductivity (FLC) $\ddot{I}{ƒ}^{\prime }(T)$ and pseudogap (PG) $\hat{I}{”}^{\ast }(T)$ derived from measurements of resistivity $\ddot{I}(T)$ of an optimally dope…