Raman scattering through surfaces having biaxial symmetry

Details Raman scattering through surfaces having biaxial symmetry Raman scattering through surfaces having biaxial symmetry

2002-04-14

arxiv.org/abs/cond-mat/0204312v1

Physics

Condensed Matter

Strongly Correlated Electrons

To be published as a Comment in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.65.176403

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 in Phys. Rev. B, {\bf 62}, 14113 (2000). The angular dependence of the two-magnon scattering is shown to provide information for the magnetic anisotropy in the Sr_14Cu_24O_41 and La_6Ca_8Cu_24O_41 compounds. We point out that the experimental results of polarized Raman measurements at arbitrary angles with respect to the crystal axes have to be corrected for the light ellipticity induced inside the optically anisotropic crystals. We refer quantitatively to the case of Sr_14Cu_24O_41 and discuss potential implications for spectroscopic studies in other materials with strong anisotropy.

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