Multiple-phonon resonant raman scattering processes in GaSe

"Excitation of multiple phonon modes in copper metaborate CuB2O4 via non-resonant impulsive stimulated Raman scattering"

Copper metaborate CuB2O4 is a material with a unique crystallographic structure, space group 42m (Z=12), in which magnetic Cu ions occupy two types of nonequivalent positions 4b and 8d. Below the antiferromagnetic ordering at TN = 21 K this material demonstrates a very complicated magnetic phase diagram with commensurate and incommensurate phases [1]. This material also demonstrates very intere...

Resonant Raman scattering in O2

Raman scattering of molecular oxygen in the region of the Schumann–Runge absorption band system is calculated from first principles in the second order of perturbation theory in the interaction of photon–electron operator. Quantitative predictions are given for the cross sections for scattering of photons and a detailed comparison is made with available measurements. The behavior of Raman spect...

Resonant Raman scattering in antiferromagnets

Two-magnon Raman scattering provides important information about electronic correlations in the insulating parent compounds of high-Tc materials. Recent experiments have shown a strong dependence of the Raman signal in B1g geometry on the frequency of the incoming photon. We present an analytical and numerical study of the Raman intensity in the resonant regime. It has been previously argued by...

Exciton-phonon interaction in GaSe

Double-resonant Raman scattering in graphite: Interference effects, selection rules, and phonon dispersion

We present a comprehensive analysis of double-resonant Raman scattering in graphite and derive an analytical expression for the Raman cross section of the D mode in one dimension. The extension to two dimensions does not change the double-resonant phonon wave vectors. In the full integration of the Raman cross section, the contributions by phonons from exactly the K point cancel due to destruct...