Charge transport in CaTiO₃: III. Jonker analysis

The present work considers semiconducting properties of undoped CaTiO₃ in terms of electrical conductivity and thermopower as a function of oxygen partial pressure. Comparison of the two plots indicates that there is a substantial discrepancy between the P(0₂) corresponding to minimum of electrical conductivity and the P(0₂) corresponding to zero value of the thermopower. According to the applied Jonker formalism, the mobility of electrons is substantially larger than that of electron holes, however, the discrepancy between the two is beyond the range which may be explained assuming different mechanisms.