Inverse dielectric response function for copper oxide superconductors
A. C. Sharma, Ina Kulshrestha
DOI 10.1103/PhysRevB.46.6472 · Physical Review B
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Abstract
We use a layered-electron-gas model to calculate the inverse electronic dielectric response functions for the normal state of copper oxide superconductors with one and two copper oxide layers per unit cell. Our calculation demonstrates that the low-energy electronic collective-excitation spectrum consists of both acoustic and optic plasmons. The acoustic plasmon modes are found to be well behaved only for certain restricted values of the wave vector and damping parameter. Our computed optical inverse dielectric response function exhibits one peak in the low-energy region and varies as βω2 for 0≤ω≤ωp. Here β is a material-dependent parameter and ωp is the position of the peak that corresponds to the intraband optic plasmon mode. Our calculated optical dielectric response functions show excellent agreement with the experimental results of Bozovic for 0≤ω≤ωp.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Tl2Ba2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba2Sr2CaCu2O8 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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