Direct observation of vortex lattice in Bi2Sr2CaCu2O8+δ by low temperature STM/STS

Noritaka Fukuo, Hideki Mashima, Taro Hitosugi, Satoshi Uchida, Jun ichi Shimoyama, Kohji Kishio, Yuji Matsumoto, Tetsuya Hasegawa

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In order to investigate the correlation between vortex distribution and inherent electronic inhomogeneity, we have performed scanning tunneling microscopy/spectroscopy (STM/STS) of optimally doped Bi2212 single crystals. Vortices have been successfully visualized by mapping differential tunneling conductance at 12 meV, which was substantially enhanced around the vortex cores. We found that most of the vortices were located in the regions displaying relatively large gaps and rounded gap edges. However, some vortices penetrated smaller gap regions, giving evidence that the non-superconducting large Δ regions originally existing in the crystals favor to pin down vortices.

    Original languageEnglish
    Pages (from-to)734-735
    Number of pages2
    JournalPhysica C: Superconductivity and its applications
    Volume460-462 II
    Issue numberSPEC. ISS.
    DOIs
    Publication statusPublished - 2007 Sep 1

    Keywords

    • Bi2212
    • Electronic inhomogeneity
    • Scanning tunneling microscopy/spectroscopy
    • Vortex pinning

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering

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