Orbital ordering in a two-dimensional triangular lattice

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • H. F. Pen - , University of Groningen (Author)
  • J. Van den Brink - , University of Groningen (Author)
  • D. I. Khomskii - , University of Groningen (Author)
  • G. A. Sawatzky - , University of Groningen (Author)

Abstract

We discuss the role of orbital ordering in a two-dimensional triangular lattice. Usually, this lattice is considered as “frustrated.” We show that a peculiar type of orbital ordering can remove this frustration if we allow for orbital degeneracy. We pay special attention to the d2 case, for which we present mean field calculations for possible orbital orderings and an exact diagonalization study of a three-site cluster within a degenerate Hubbard model. The results support the possibility of an orbitally ordered singlet ground state. In particular, it provides new insight to the magnetic phase transition and the low temperature phase ofLiVO2.

Details

Original languageEnglish
Pages (from-to)1323-1326
Number of pages4
JournalPhysical review letters
Volume78
Issue number7
Publication statusPublished - 17 Feb 1997
Peer-reviewedYes
Externally publishedYes

Keywords

ASJC Scopus subject areas