Orbital and Spin Excitations in Cobalt Oxide

Details Orbital and Spin Excitations in Cobalt Oxide Orbital and Spin Excitations in Cobalt Oxide

2007-06-22

arxiv.org/abs/0706.3345v1

Physica B 403 (2008) p. 1406

Physics

Condensed Matter

Strongly Correlated Electrons

To be published in Physica B (Proceedings of SCES07 conference in Houston)

Scientific paper

10.1016/j.physb.2007.10.306

By means of neutron scattering we have determined new branches of magnetic excitations in orbitally active CoO (TN=290 K) up to 15 THz and for temperatures from 6 K to 450 K. Data were taken in the (111) direction in six single-crystal zones. From the dependence on temperature and Q we have identified several branches of magnetic excitation. We describe a model for the coupled orbital and spin states of Co2+ subject to a crystal field and tetragonal distortion.

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