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Charge-transfer excitations in the cuprate superconductors

Dadachanji, Z., Godby, R.W., Needs, R.J. and Littlewood, P.B. (1995) Charge-transfer excitations in the cuprate superconductors. Physical Review B, 52 (22). pp. 16204-16207. ISSN 1098-0121

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First-principles calculations of the dielectric matrix of the key structural element of the copper-oxide super-conductors show a weakly damped resonance at 3.5 eV which contains most of the oscillator strength in charge-transfer excitations. Such excitations have been proposed as a mediating boson for superconductive pairing. Although this mode is a well-developed and robust excitation, we find its energy to be too large to give high superconducting transition temperatures.

Item Type: Article
Copyright, Publisher and Additional Information: © 1995 American Physical Society.
Institution: The University of York
Academic Units: The University of York > Physics (York)
Depositing User: Physics Import
Date Deposited: 25 Sep 2008 10:16
Last Modified: 25 Sep 2008 10:16
Published Version: http://link.aps.org/abstract/PRB/v52/p16204
Status: Published
Publisher: American Physical Society
Refereed: Yes
Identification Number: 10.1103/PhysRevB.52.16204
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/3991

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