Photoinduced nanodots in Bi2Sr2CaCu2O 8+d

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

*Corresponding author for this work

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
Externally publishedYes


  • Bisrcacuo
  • Nanodots
  • Photoinduced effect
  • Pinning effect

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering (miscellaneous)


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