摘要
We have analyzed recently published data of the ac electrical conductivity and dielectric constant in La_(0.8)Te_(0.2)MnO_(3)(LTMO),and at temperatures below 500 K both quantities follow the universal dielectric response(UDR)typical of hopping or tunneling of localized charge carriers.A detailed analysis of the temperature dependence of the UDR parameter s in terms of the theoretical model for tunneling of small polarons revealed that below 500 K,this mechanism governs the charge transport in LTMO system.
基金
Research was supported by the Slovenian Research Agency(P1-0125).
