Resonant Two-Magnon Raman Scattering in Cuprate Antiferromagnetic Insulators

Abstract

We present results of low-temperature two-magnon resonance Raman excitation profile measurements for single layer Sr_2CuO_2Cl_2 and bilayer YBa_2Cu_3O_{6 + δ} 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 triple resonance theory of Chubukov and Frenkel (Phys. Rev. Lett., 74, 3057 (1995)) and deduce information about magnetic interaction and band parameters in these materials.

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References in corpus (3)

• Resonant two-magnon Raman scattering in parent compounds of high-T${}_c$ superconductors.
• Resonant two-magnon Raman scattering in antiferromagnetic insulators
• On the contrasting spin dynamics of $L{a}_{2-x}S{r}_{x}Cu{O}_4$, $N{d}_{2-x}C{e}_{x}Cu{O}_4$ and $YB{a}_{2}C{u}_3{O}_{6+x}$ near half filling

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