Short Notice: Metal-insulator transition in single crystals Y1−zPrzBa2Cu3O7−δ

The aim was to conduct comparative studies of the evolution of conductivity along and across the base ab plane in Y1−zPrzBa2Cu3O7−δ single crystals at different degrees of praseodymium doping in a wide range of concentrations 0≤z≤0.5. It is established that the increase in the degree of praseodymium doping in samples Y1−zPrzBa2Cu3O7−δ leads to increased effects of localization and implementation in the system of metal–insulator type transition, which always precedes the superconducting transition. Increasing the concentration of praseodymium leads to a significant shift in the beginning of the metal–insulator transition at the low temperature region.