Publications

We have measured the Raman spectra of superconducting single crystals, A sub 2 B Cu sub 3 0 sub x with A = Ba, Sr, Ca and B = Y, rare earth, between 100 and 800 cm sup -1.

We have studied the Cu-O vibrations in the MBa sub 2 Cu sub 3 O sub 7 systems with M = Y, Eu and Gd by Raman spectroscopy. The observed Raman features are similar in the three systems.

We report an inelastic light scattering study of the effects of charge ordering on the spin, charge, and lattice dynamics of Bi1-xCaxMnO3 (x > 0.5).

Laser induced glass-crystalline transition is studied by light scattering.

Attempts to use thermally grown native oxides on InP have failed to produce a dielectric which is suitable for MIS transistor applications.

We present a Raman scattering study of CdTe-ZnTe superlattices. The Raman spectra show confined and interface optical phonons.

Magnetic Raman scattering in two-leg spin ladder materials and the relationship between the anisotropic exchange integrals are analyzed by P. J. Freitas and R. R. P. Singh {[}Phys. Rev.

Crystalline SiSe2 and a series of Si(x)Se(1-x) clear yellow- orange glasses (0.33 x = 0.4) were synthesized and studied by Raman spectroscopy.

We present a polarization study and normal mode analysis of the Raman spectra of Ba sub 2 MCu sub 3 O sub x single crystals (6 = x = 7) in the orthorhombic and tetragonal phase.

With the diamond anvil cell, it is now possible to perform Raman measurements on solids up to megabar pressures using micro-laser Raman techniques.