Abstract
Abstract Direct current (dc) electrical transport and photoinduced properties of the high-quality epitaxial thin film of the hole-doped chromium oxide La 0.7 Sr 0.3 CrO 3 on a (1 0 0)-oriented LaAlO 3 substrate have been studied. The sample exhibits semiconductive behavior and the electrical transport mechanism agrees with the adiabatic small polaron hopping model. The laser irradiation results in a decrease of the resistivity of the film in the whole temperature range measured, which is attributed to the delocalization of the small polarons.
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