Electrical conductivity and thermal activation energies in Cu2O single crystals

A systematic investigation, performed on some fifty single crystals, between −40 and 250 °C shows that the values of the bulk resistivity ϱv (20 °C) range from 103 to 1013 Ωcm and that the activation energies lie between 0.1 and 1 eV. These values depend on the conditions of the cooling after oxydation and of high vacuum annealing. A quasi-continuous relation between E and lg ϱv (20 °C) is found.