Journal
PHYSICAL REVIEW B
Volume 63, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.63.174423
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Light illumination produces major, interesting changes of the electrical properties of oxygen deficient La2/3Sr1/3MnO3-delta thin films. At small oxygen deficiency, the classical insulator-metal (I-M) transition at a temperature T-p 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.
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