Persistent and transient photoconductivity in oxygen-deficient La2/3Sr1/3MnO3-δ thin films

R. Cauro, A. Gilabert, J. P. Contour, R. Lyonnet, M. G. Medici, J. C. Grenet, C. Leighton, I. K. Schuller

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Light illumination produces major, interesting changes of the electrical properties of oxygen deficient La2/3Sr1/3MnO3-δ thin films. At small oxygen deficiency, the classical insulator-metal (I-M) transition at a temperature Tp decreases with increasing oxygen deficiency. The low-temperature metallic behavior in darkness shows a persistent increase of the conductivity with light. This photoconductivity increases with oxygen deficiency (from a few to 60%). At large, oxygen deficiency, the films are semiconducting in darkness, from helium to room temperature and light induces a transient photoconductivity and a low-temperature I-M transition. The intriguing possibility of collective light induced magnetism is discussed.

Original languageEnglish (US)
Article number174423
Pages (from-to)1744231-1744236
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number17
StatePublished - 2001


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