Dipolon-plasmon interaction in high-Tc superconducting materials
R. R. Sharma
DOI 10.1103/PhysRevB.54.10192 · Physical Review B
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Abstract
In this article interaction between the dipolon waves and the longitudinal plasma waves has been studied adopting a self-consistent field approach. The combined dispersion relation has been obtained which shows that both the dipolon waves and the plasma waves are modified. We discuss our results in relevance to free-electron plasma peaks observed at ∼1.1 eV in inelastic electron scattering and optical spectroscopy measurements in high-temperature superconductors. Our calculations for YBa2Cu3O7 show that the plasma frequency decreases whereas the slope of the plasmon dispersion curve at long wavelength increases because of interaction with dipolon excitations, consistent with the experimental result due to Romberg et al. Our investigation has made it possible to propose that the experimentally observed peak at ∼1.1 eV may be due to plasmons interacting with dipolon excitations in high-temperature superconductors. © 1996 The American Physical Society.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xBaxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| HgBa2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O6.93 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O6.60 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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