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ABSTRACT: We applied dc voltage (V) to the LuFe2O4 single crystal and measured the V-dependent optical reflectivity. As V increases, an optical absorption band appears at the mid-infrared frequency range which we could identify as resulting from the dc electric (E) field. We discuss possible connection of this novel electro-optical effect with the strongly correlated states in LuFe2O4. In the mean time, a reflectivity level change is seen in the IR ∼ visible frequency range by the V application due to the Joule heating of the sample.
Physical review. B, Condensed matter 01/1970; 85(1).