On a biphononic origin of the 1125 cm^(-1) absorption band in cuprous oxide

We report on the IR spectroscopic studies in both reflection (50-900 cm^{-1}) and transmission (900-3000 cm^{-1}) mode of the vibration spectrum of the cuprous oxide. A detailed analysis based on a comparison of the temperature dependences of the absorption band at 1125 cm^{-1} and of IR and Raman active fundamental vibrations results in assignment of the former to a biphonon.Comment: 5 pages, 5 figures (to appear in Phys.Lett. A

Experience of member-countries of Council for Mutual Economic Aid in field of development controlled rolling

Translated from Russian (Stal' 1986 (11) p. 48-51)Available from British Library Document Supply Centre- DSC:5828.4(M--37200)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Experience of member-countries of Council for Mutual Economic Aid in field of development controlled rolling

Translated from Russian (Stal' 1986 (11) p. 48-51)Available from British Library Document Supply Centre- DSC:5828.4(M--37200)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Structural and optical characterization of thermally evaporated cadmium sulfide thin films

WOS: 000262455100012The article reports the structural and optical properties of vacuum-evaporated cadmium sulfide (CdS) films with different thicknesses at room temperature. The structural investigations performed by means of X-ray diffraction (XRD) technique have showed that all the films have the zinc-blende structure, a face-centered cubic form with lattice constants a=b=c=5.82 angstrom and point group F (4) over bar 3m. Crystallite sizes calculated from Scherrer relation are in the range of 173-345 angstrom. So far, because the optical parameters of the metastable cubic CdS have not been so well known, we apply spectroscopic ellipsometry to determine the thickness, optical constants and energy band gap of CdS thin film deposited by thermal evaporation onto opaque gold substrate, a perfect reflectivity and inert metal. As shown the measured spectral behavior of the optical constants and the band gap value of CdS thin film are in agreement with those obtained by the reflectance and transmittance methods. The energy band gap of CdS thin film determined from the spectral behavior of the absorption coefficient is about 2.46 eV. Copyright (C) 2008 John Wiley & Sons, Ltd