Concentration of small ring structures in vitreous silica from a first-principles analysis of the Raman spectrum
A density-functional scheme for the calculation of Raman spectra of disordered materials was developed. Applied to vitreous silica, it was found that the HH Raman spectrum is strongly sensitive to intermediate range order.
Keywords: Crystal structure ; Dielectric devices ; Finite difference method ; Frequencies ; Light polarization ; Perturbation techniques ; Raman spectroscopy ; Tensors ; First principles analysis ; Oxygen bending motion ; Raman coupling tensor ; Raman defect lines ; Small ring structure ; Fused silica
Record created on 2009-10-08, modified on 2016-08-08