Theory for high spin systems with orbital degeneracy

Details Theory for high spin systems with orbital degeneracy Theory for high spin systems with orbital degeneracy

2001-11-22

arxiv.org/abs/cond-mat/0111426v1

Phys. Rev. Lett. 88, 027201 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

4 page, three figures, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.88.027201

High-spin systems with orbital degeneracy are studied in the large spin limit. In the absence of Hund's coupling, the classical spin model is mapped onto disconnected orbital systems with spins up and down, respectively. The ground state of the isotropic model is an orbital valence bond state where each bond is an orbital singlet with parallel spins, and neighbouring bonds interact antiferromagnetically. The possible relevance to the transition metal oxides are discussed.

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