Scanning tunneling microscope studies on the atomic structures in NdBa2Cu3O7-δ single crystals

M. Nishiyama, N. Chikumoto, M. Murakami, K. Ogawa

研究成果: Conference article査読

7 被引用数 (Scopus)

抄録

Atomic and electronic structures of the cuprate NdBa2Cu3O7-δ, which is processed by the oxygen-controlled-melt-growth (OCMG) method, have been studied by scanning tunneling microscopy/spectroscopy (STM/STS). Two characteristic microstructures, namely, island and striped structures have been observed, the latter for the first time. The former is a well-known pinning center in OCMG Nd123. The islands are of a couple of tens of nanometers in size and are found to be less conductive than the embedding matrix. Three types of stripes, namely, regular, spotted and irregularly spaced ones, have been observed. The stripe consists of lines of bright contrast and of a few atom rows running parallel to and between the neighboring lines of bright contrast. The striped band is more conductive than the matrix. The striped and flat bands of a couple of tens of nanometers wide each are found to be arranged alternately. We suggest the striped structure to be a good candidate for another strong pinning center in OCMG Nd123.

本文言語English
ページ(範囲)251-258
ページ数8
ジャーナルPhysica C: Superconductivity and its applications
335
1
DOI
出版ステータスPublished - 2000 6月
外部発表はい
イベント9th Japan-US Workshop on High-Tc Superconductors - Yamanashi, Jpn
継続期間: 1999 10月 131999 10月 15

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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