Charge-transfer excitations in the cuprate superconductors
Z. Dadachanji, R. W. Godby, R. J. Needs, P. B. Littlewood
DOI 10.1103/PhysRevB.52.16204 · Physical Review B
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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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CuO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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