Raman scattering study of heavily oxygenated YSr2Cu3O7+δ and AuBa2YCu2O7+δ superconductors

A. P. Litvinchuk, M. N. Iliev, H. G. Lee, M. V. Abrashev, L. M. Dezaneti, B. R. Hickey, Y. Y. Xue, C. W. Chu

Research output: Contribution to journalConference articlepeer-review

Abstract

Raman scattering spectroscopy was used to monitor structural peculiarities and charge distribution in highly oxygenated YSr2Cu3O7+δ and AuBa2YCu2O7+δ superconductors, which do not possess linear copper-oxygen chains. The oxidation state of the chain metal ions (Cu or Au) in these materials was estimated by comparison of the experimentally determined frequency of the c-axis apex oxygen vibration and the results of model calculations which account for the nearest-neighbor interactions. The enrichment of the Raman spectra with respect to optimally doped RBa2Cu3O6.95 superconductors is interpreted as being due to the lower symmetry of atomic sites in the basal plane.

Original languageEnglish
Pages (from-to)2205-2208
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume341-348 (IV)
DOIs
Publication statusPublished - 2000 Nov
EventInternational Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI - Houston, TX, USA
Duration: 2000 Feb 202000 Feb 25

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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