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.
|頁（從 - 到）||2205-2208|
|期刊||Physica C: Superconductivity and its applications|
|出版狀態||Published - 2000 十一月|
|事件||International Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI - Houston, TX, USA|
持續時間: 2000 二月 20 → 2000 二月 25
All Science Journal Classification (ASJC) codes