Possible evidence for the existence of the Fehrenbacher-Rice band: O K-edge XANES study on

I. P. Hong; J.-Y. Lin; J. M. Chen; S. Chatterjee; S. J. Liu; Y. S. Gou; H. D. Yang

doi:10.1209/epl/i2002-00614-6

All issues

Volume 58 / No 1 (April 2002)

Europhys. Lett., 58 1 (2002) 126-132

Abstract

Issue		Europhys. Lett. Volume 58, Number 1, April 2002


Page(s)		126 - 132
Section		Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI		https://doi.org/10.1209/epl/i2002-00614-6
Published online		01 August 2002

Europhys. Lett., 58 (1), pp. 126-132 (2002)

Possible evidence for the existence of the Fehrenbacher-Rice band: O K-edge XANES study on $Pr_{1-x}Ca_xBa_2Cu_3O_7$

I. P. Hong¹, J.-Y. Lin², J. M. Chen³, S. Chatterjee¹, S. J. Liu⁴, Y. S. Gou⁴ and H. D. Yang¹

¹ Department of Physics, National Sun Yat-Sen University Kaohsiung 804, Taiwan, ROC
² Institute of Physics, National Chiao Tung University - Hsinchu 300, Taiwan, ROC
³ Synchrotron Radiation Research Center (SRRC) - Hsinchu 300, Taiwan, ROC
⁴ Department of Electrophysics, National Chiao Tung University Hsinchu 300, Taiwan, ROC

Corresponding author: ago@cc.nctu.edu.tw

Received: 8 August 2001
Accepted: 21 January 2002

Abstract

X-ray absorption near edge structure (XANES), resistivity, and thermoelectric power have been measured on $\chem{Pr}$ $_{1-x}$ $\chem{Ca}$ _x $\chem{Ba_2Cu_3O_7}$ . These data reveal an intriguing electronic structure in $\chem{Pr}$ -doped cuprates. The absorption peak in XANES associated with the Fehrenbacher-Rice (FR) band has been identified. The $\chem{Ca}$ -doped holes in $\chem{Pr}$ $_{1-x}$ $\chem{Ca}$ _x $\chem{Ba_2Cu_3O_7}$ go to both the Zhang-Rice (ZR) and FR bands. Comparative studies on the related samples suggest that the FR band is partially filled and highly localized. Implications of these results on other recent experiments, such as the observation of superconductivity in $\chem{PrBa_2Cu_3O_7}$ single crystals, are discussed.

PACS: 74.72.-h – High- $T_{\ab{c}}$ compounds / 74.25.Jb – Electronic structure / 74.62.Dh – Effects of crystal defects, doping and substitution

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