Reflectance and Raman spectra of metallic oxides, LaSrCoO and CaSrRuO: Resemblance to superconducting cuprates

Ivan Bozovic, Jae Hoon Kim, J. S. Harris, C. B. Eom, Julia M. Phillips, J. T. Cheung

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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.

Original languageEnglish
Pages (from-to)1436-1439
Number of pages4
JournalPhysical Review Letters
Issue number10
Publication statusPublished - 1994 Jan 1


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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