Direct observation of Pr-CuO2 hybridization in PrBa2Cu3O7-δ by the MEM charge density study

Masaki Takata, Takashi Takayama, Makoto Sakata, Satoshi Sasaki, Katsuaki Kodama, Masatoshi Sato

研究成果: Article査読

21 被引用数 (Scopus)


In order to prove the existence of hybridization between the Pr and CuO2 conduction planes, a charge density study of PrBa2Cu3O6.87(PrBCO) and YBa2Cu3O6.97(YBCO) has been carried out by the maximum entropy method (MEM) using synchrotron radiation (SR) powder data. In the charge density of PrBCO obtained by MEM, there can be found directional robes of the charge density from the Pr atom toward the O atoms in the CuO2-planes. For YBCO there have not been observed appreciable charge densities in the interatomic region around the Y atom. The distinct difference of the charge densities between PrBCO and YBCO presents clear experimental evidence of the hybridization between Pr 4f-O 2pπ orbitals which supports the idea that the hole trapping by the hybridized states suppresses the superconductivity in PrBCO.

ジャーナルPhysica C: Superconductivity and its applications
出版ステータスPublished - 1996 5

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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