Orbital polarization in LiVO_2 and NaTiO_2

Details Orbital polarization in LiVO_2 and NaTiO_2 Orbital polarization in LiVO_2 and NaTiO_2

1997-12-18

arxiv.org/abs/cond-mat/9712230v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 4 figures

Scientific paper

10.1209/epl/i1998-00499-9

We present a band structure study of orbital polarization and ordering in the two-dimensional triangular lattice transition metal compounds LiVO_2 and NaTiO_2. It is found that while in NaTiO_2 the degeneracy of t_{2g} orbitals is lifted due to the trigonal symmetry of the crystal and the strong on cite Coulomb interaction, in LiVO_2 orbital degeneracy remains and orbital ordering corresponding to the trimerization of the two-dimensional lattice develops.

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