Orbital order in classical models of transition-metal compounds

Details Orbital order in classical models of transition-metal compounds Orbital order in classical models of transition-metal compounds

2003-09-30

arxiv.org/abs/cond-mat/0309692v2

Europhys. Lett. 67 (2004), no. 6, 990-996

Physics

Condensed Matter

Statistical Mechanics

7 pages, 1 eps fig

Scientific paper

10.1209/epl/i2004-10134-5

We study the classical 120-degree and related orbital models. These are the classical limits of quantum models which describe the interactions among orbitals of transition-metal compounds. We demonstrate that at low temperatures these models exhibit a long-range order which arises via an "order by disorder" mechanism. This strongly indicates that there is orbital ordering in the quantum version of these models, notwithstanding recent rigorous results on the absence of spin order in these systems.

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