Charge-transfer excitations in the cuprate superconductors

Z. Dadachanji; R.W. Godby; P.B. Littlewood; R.J. Needs

doi:10.1103/PhysRevB.52.16204

Charge-transfer excitations in the cuprate superconductors

Z. Dadachanji, R.W. Godby, P.B. Littlewood, R.J. Needs

Physics

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

Abstract

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.

Original language	English
Pages (from-to)	16204-16207
Number of pages	3
Journal	Physical Review B
Volume	52
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.52.16204
Publication status	Published - 1 Dec 1995

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10.1103/PhysRevB.52.16204

Cite this

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title = "Charge-transfer excitations in the cuprate superconductors",

abstract = "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.",

author = "Z. Dadachanji and R.W. Godby and P.B. Littlewood and R.J. Needs",

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AU - Godby, R.W.

AU - Littlewood, P.B.

AU - Needs, R.J.

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AB - 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.

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DO - 10.1103/PhysRevB.52.16204

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