Reflectance and Raman Spectra of Metallic Oxides, LaSrCoO and CaSrRuO: Resemblance to Superconducting Cuprates
Ivan Bozovic, J. H. Kim, J. S. Harris, Jr., C. B. Eom, Julia M. Phillips, J. T. Cheung
DOI 10.1103/PhysRevLett.73.1436 · Physical Review Letters
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Abstract
We have measured reflectance, ellipsometric, and Raman spectra on thin films of isotropic metallic oxides La0.5Sr0.5CoO3 and Ca0.5Sr0.5RuO3. The spectra strongly resemble those of cuprate superconductors. In particular, reflectance is a nearly linear function of frequency throughout the infrared, and the electronic Raman scattering continuum is nearly independent of energy. Neither of the compounds is superconducting down to 4.2 K, while their electronic excitations spectra are apparently like those of the cuprates. Hence, it seems unlikely that the corresponding "anomalous" dielectric response could be the sole root of high-temperature superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| 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 |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La1.85Sr0.15CuO4 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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