Free-charge-carrier plasmons in Ba1-xKxBiO3: A close relation to cuprate superconductors

Ivan Bozovic, J. H. Kim, J. S. Harris, E. S. Hellman, E. H. Hartford, P. K. Chan

Research output: Contribution to journalArticlepeer-review


Broad-range reflectance and ellipsometric spectra of high-quality epitaxial superconducting Ba1-xKxBiO3 thin films are reported. From these data, accurate spectral functions of Ba1-xKxBiO3 have been obtained. They are found to be quite similar to the in-plane spectra of the superconducting cuprates; in particular, the frequency dependence of the reflectance is nearly linear, while the dielectric loss function is nearly quadratic below the plasma edge in all of these compounds. It is therefore unlikely that acoustic plasmons or magnetic fluctuations are the cause of these anomalous spectral features.

Original languageEnglish
Pages (from-to)1182-1187
Number of pages6
JournalPhysical Review B-Condensed Matter
Issue number2
Publication statusPublished - 1992

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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