Non-exponential optical modification of the electrical properties in oxygen-deficient YBa2Cu3Ox

Wilhelm Markovitsch (Korresp. Autor*in), P. Brantner, Wolfgang Lang, Martin Peruzzi, Johannes D. Pedarnig, Dieter Bäuerle

    Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

    Abstract

    We present studies of the time dependent electrical resistivity of YBa 2Cu3Ox during visible light excitation (photodoping). Illumination with a green semiconductor laser changes the resistivity in a non-exponential way, which is well described by a stretched-exponential function with parameters ? (dispersion parameter) and ? (time constant). ? showed an unusual behaviour: at temperatures below 220 K ? was about 0.3 to 0.4, but increased near room temperature to 0.5 to 0.6. For comparison with results obtained by red-laser excitation we discuss the dependence of the resistivity on the cumulative photon dose, thereby introducing a photon dose constant Ne which corresponds to ?. The results indicate that green-light excitation is somewhat more effective than red-light excitation at low temperatures. Œ 2006 IOP Publishing Ltd.
    OriginalspracheEnglisch
    Seiten (von - bis)694-697
    Seitenumfang4
    FachzeitschriftJournal of Physics: Conference Series
    Jahrgang43
    Ausgabenummer1
    DOIs
    PublikationsstatusVeröffentlicht - 2006

    ÖFOS 2012

    • 1030 Physik, Astronomie

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