Infrared optical response of LuFe 2O 4 under dc electric field

Chul Lee, Jooyoun Kim, S. W. Cheong, E. J. Choi

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We applied dc voltage (V) to the LuFe 2O 4 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 LuFe 2O 4. 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.

Original languageEnglish
Article number014303
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number1
StatePublished - 25 Jan 2012


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