Photoinduced nanodots and pinning effects in Bi2Sr2CaCu2O8+d

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

研究成果: Article

抜粋

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 Tc 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 (at least 5 times larger than the initial one), 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.

元の言語English
ページ(範囲)443-446
ページ数4
ジャーナルPhysica C: Superconductivity and its Applications
445-448
発行部数1-2
DOI
出版物ステータスPublished - 2006 10 1
外部発表Yes

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ASJC Scopus subject areas

  • Condensed Matter Physics

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