Raman scattering of cuprates

Although the basic nature of the charge and associated spin order in cuprates and nickelates has now been fairly well been established, many questions concerning this order remain to be answered. One of our goals here was to elucidate some problems that are under discussion at present. Unquestionable, Raman scattering will continue to be an essential tools as we try to improve our understanding of stripe ordering and other complex correlation effects. 

S.L. Cooper, Electronic and magnetic Raman scattering studies of the high-Tc cuprates 509... 

ELECTRONIC AND MAGNETIC RAMAN SCATTERING STUDIES OF THE HIGH-Tc CUPRATES... 

Fig. 2. The functional dependence of the Raman scattering vertices, y,, associated with the tetragonal D41, point group of the cuprates for Big (y ) symmetry B2g (yf ) symmetry and (y ) symmetry, for the...

Fig. 6. Diagram of the two-magnon Raman scattering process in the cuprates (a) initial antiferromagnetic spin configuration on the Cu sites (b) incident photon excitation of a spin-up Cu(3d ) hole to an intermediate-state 0(2p) orbital (c) double spin flip due to direct spin exchange between the spin-up hole on the intermediate-state 0(2p) site and a spin-down hole on a nearest-neighbor Cu site (d) hopping of a spin-down hole from the 0(2p) intermediate state to the original copper site, emitting the scattered photon.

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