IR reflection and Raman spectra of Bi-Sr-Ca-Cu-O superconducting compounds
Kosogov O.V., Belousov M. V., Vasil'ev V. A., Davydov V. Yu., Kim Gvan Dyo, Kopylov A. A., Petrikov V. D., Tret'yakov V. V.
The IR reflection and Raman spectra of Bi-Sr-Ca-Cu-O ceramic and single-crystal high-temperature superconductors have been measured. The polarizations of the vibrations corresponding to 460 to 630 cm -1 have been determined. The frequencies of plasma vibrations are estimated. The width of the superconducting gap is also estimated: 2Δ = 250 cm-1.