The role of electronic correlations on the phonon modes of MnO and NiO
arXiv:cond-mat/0308188 · doi:10.1103/PhysRevB.68.140406
Abstract
The possibility of magnetic-order induced phonon anisotropy in single crystals of MnO and NiO is investigated using inelastic neutron scattering. Below Tn both compounds exhibit a splitting in their transverse optical phonon spectra of approximately 10%. This behavior illustrates that, contrary to general assumption, the dynamic properties of MnO and NiO are substantially non-cubic.
4 pages, 4 figures
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