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

doi:10.1016/0921-4534(96)80010-4

Direct observation of Pr-CuO₂ hybridization in PrBa₂Cu₃O_7-δ by the MEM charge density study

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

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

In order to prove the existence of hybridization between the Pr and CuO₂ conduction planes, a charge density study of PrBa₂Cu₃O_6.87(PrBCO) and YBa₂Cu₃O_6.97(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 2p_π orbitals which supports the idea that the hole trapping by the hybridized states suppresses the superconductivity in PrBCO.

Original language	English
Pages (from-to)	340-343
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	263
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4534(96)80010-4
Publication status	Published - 1996 May
Externally published	Yes

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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10.1016/0921-4534(96)80010-4

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

abstract = "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.",

author = "Masaki Takata and Takashi Takayama and Makoto Sakata and Satoshi Sasaki and Katsuaki Kodama and Masatoshi Sato",

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AU - Takata, Masaki

AU - Takayama, Takashi

AU - Sakata, Makoto

AU - Sasaki, Satoshi

AU - Kodama, Katsuaki

AU - Sato, Masatoshi

PY - 1996/5

Y1 - 1996/5

N2 - 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.

AB - 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.

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Direct observation of Pr-CuO₂ hybridization in PrBa₂Cu₃O_7-δ by the MEM charge density study

Abstract

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