Structural Study of Inhomogeneous Charge Distribution of Inequivalent CuO2 Planes in Bi2.1Sr1.9Ca2Cu3O10+.DELTA. Single Crystals

  • Watanabe Takao
    NTT Basic Research Laboratories
  • Fujii Takenori
    Department of Applied Physics, Faculty of Science, Science University of Tokyo
  • Matsuda Azusa
    NTT Basic Research Laboratories Department of Applied Physics, Faculty of Science, Science University of Tokyo

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  • Structural Study of Inhomogeneous Charge Distribution of Inequivalent CuO2 Planes in Bi2.1Sr1.9Ca2Cu3O10+δ Single Crystals
  • Structural Study of Inhomogeneous Charge Distribution of Inequivalent CuO2 Planes in Bi2 1Sr1 9Ca2Cu3O10 デルタ Single Crystals
  • Structural Study of Inhomogeneous Charge Distribution of Inequivalent CuO<sub>2</sub>Planes in Bi<sub>2.1</sub>Sr<sub>1.9</sub>Ca<sub>2</sub>Cu<sub>3</sub>O<sub>10+δ</sub>Single Crystals

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Four-circle x-ray diffraction measurements were carried out on a single crystal of Bi2.1Sr1.9Ca2Cu3O10+δ with doping levels from underdoped to overdoped. The excess charge of each inequivalent CuO2 plane was estimated using the obtained inter-atomic distances in two ways by means of the bond–valence-sum method. The copper valence and the valence sum of the copper and the surrounding oxygen ions gave contradictory results for the inhomogeneous charge distribution of the inequivalent CuO2 planes.

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