Spin-orbit excitons in CoO

@article{Sarte2019SpinorbitEI,
  title={Spin-orbit excitons in CoO},
  author={P M Sarte and M Songvilay and E. Pachoud and Russell A Ewings and Christopher D. Frost and Dharmalingam Prabhakaran and Ka H Hong and Alexander J. Browne and Zain Hassan Yamani and John Paul Attfield and Efrain E. Rodriguez and Stephen D. Wilson and Christopher Stock},
  journal={Physical Review B},
  year={2019}
}
CoO has an odd number of electrons in its unit cell, and therefore is expected to be metallic. Yet, CoO is strongly insulating owing to significant electronic correlations, thus classifying it as a Mott insulator. We investigate the magnetic fluctuations in CoO using neutron spectroscopy. The strong and spatially far-reaching exchange constants reported recently [P. M. Sarte et al., Phys. Rev. B 98, 024415 (2018)], combined with the single-ion spin-orbit coupling of similar magnitude [R. A… 
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