Role of the $Cu-O$ charge-transfer energy in the superconductivity of cuprates: evidence from Cu 2p core-level spectroscopy and theory

Rao, CNR and Rao, Ranga G and Rajumon, MK and Sarma, DD (1990) Role of the $Cu-O$ charge-transfer energy in the superconductivity of cuprates: evidence from Cu 2p core-level spectroscopy and theory. In: Physical Review B (Condensed Matter), 42 (1). pp. 1026-1028.

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Abstract

Based on Cu 2p core-level spectroscopy and theoretical calculations, it has been demonstrated that the $Cu-O$ charge-transfer excitation energy which determines the Cu 2p satellite intensity also plays a crucial role in the superconductivity of cuprates. The relative intensity of the satellite generally decreases with an increase in the $T_c$ or in the hole concentration in a given series of cuprate superconductors. In the case of $Bi_2Ca_{1-x}R_xSr_2Cu_2O_{8+\delta}$ (R=rare earth), the satellite intensity goes through a minimum around the same composition where the hole concentration as well as the $T_c$ show maxima.

Item Type:	Journal Article
Publication:	Physical Review B (Condensed Matter)
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	17 Feb 2008
Last Modified:	19 Sep 2010 04:42
URI:	http://eprints.iisc.ac.in/id/eprint/13013

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