Non-linear temperature dependence of Hg-O and Cu-O distances in Hg-1212 superconductor

Kouji Yamawaki, Satoshi Sasaki, Masato Kakihana, Masahiko Tanaka

研究成果: Article査読

1 被引用数 (Scopus)

抄録

The crystal structure of HgBa2CaCu2O6+δ (Hg-1212) has been carefully examined as a function of temperature by the single-crystal X-ray diffraction method. A significant anisotropy above the Tc (= 120 K) appeared on out-of-plane interatomic distances, such as Cu-O(2) and Hg-O(2), although the structural environment at room temperature is generally considered to maintain in the temperature vicinity of superconducting transition. On decreasing the temperature, the oxygen atom in the apical O(2) site of CuO5 pyramid approaches Hg atom and then leaves it. The anisotropic behavior would be precursor with superconductive charge-carriers, where the O(2) site plays the role of a `channel' between Hg charge reservoir and Cu-O superconducting plane.

本文言語English
ページ(範囲)133-140
ページ数8
ジャーナルPhysica C: Superconductivity and its applications
340
2-3
DOI
出版ステータスPublished - 2000 12 1
外部発表はい

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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