Two magnon resonant Raman scattering in transition metal oxides

Comment on “Two-Magnon Resonant Raman Scattering in MnF2”

Resonant two-magnon Raman scattering in cuprate antiferromagnetic insulators.

We present results of low-temperature two-magnon resonance Raman excitation profile measurements for single-layer Sr2CuO2Cl2 and bilayer YBa2Cu3O61d antiferromagnets over the excitation region from 1.65 to 3.05 eV. These data reveal composite structure of the two-magnon line shape and strong nonmonotic dependence of the scattering intensity on excitation energy. We analyze these data using the ...

Resonant two-magnon Raman scattering in antiferromagnetic insulators.

We propose a theory of two-magnon resonant Raman scattering from antiferromagnetic insulators, which contains information not only on magnetism but also on the electronic properties in these materials. We argue that the conventional theory does not work in the resonant regime, in which the energy of the incident photon is close to the gap between the conduction and valence bands. We identify th...

Raman scattering in doped transition metal pentatellurides

We have measured the Raman spectra of Sb doped (ZrTe52xSbx ; 0,x,0.25) and Hf doped (ZryHf12yTe5 ; 0,y,1) pentatellurides in the 90–300 cm 21 range, and compared them to the corresponding spectrum for the parent material ZrTe5 . X-ray diffraction data revealed that the pentatelluride structure prevails at all doping concentrations. With increasing Sb concentration, the linewidths for three of t...

Two-magnon Raman scattering in a spin density wave antiferromagnet

We present the results for a model calculation of resonant two-magnon Raman scattering in a spin density wave (SDW) antiferromagnet. The resonant enhancement of the two-magnon intensity is obtained from a microscopic analysis of the photon-magnon coupling vertex. By combining magnon-magnon interactions with ‘triple resonance‘ phenomena in the vertex function the resulting intensity line shape i...