Photoinduced nanodots in Bi2Sr2CaCu2O 8+d

M. Osada, M. Kakihana, H. Yasuoka, M. Käll, L. Börjesson

    Research output: Contribution to journalArticlepeer-review


    We report a fabrication of high-density nanodots by photodoping in overdoped Bi2Sr2CaCu2O8+d thin film (Tc = 80 K). A scanning near-field optical microscope probe is used to locally excite carrier, and photodoped region is associated with lower T c phase (Tc = 75 K) via overdoping. Nanoscale characterizations with optical reflectivity reveal that nanodots (30-nm diameter) are regularly distributed in 50-nm step. The resultant films with photoinduced nanodots enhance Jc, a situation being similar to strong pinning effects observed in films modified by either ion irradiation or sputtered nanoparticles. These results suggest that photoinduced nanodots with lower Tc act as effective pinning centers.

    Original languageEnglish
    Pages (from-to)167-170
    Number of pages4
    JournalKey Engineering Materials
    Publication statusPublished - 2006 Jan 1


    • Bisrcacuo
    • Nanodots
    • Photoinduced effect
    • Pinning effect

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering


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