ORTHORHOMBIC RAMAN SPECTRA OF Bi 2 Sr 2 CaCu 2 O 8+X SINGLE CRYSTALS

Raman spectroscopy can provide much information on the superconductivity mechanism and is also an important part in the physical study of high temperature superconductors. At present, many papers on the Raman spectra of the Bi-series high T_c superconductors have been published. However, there are still great differences among the ex-