Quantum Phase Transition in the SU(4) Spin-Orbital Model on the Triangular Lattice

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Motivated by the absence of cooperative Jahn-Teller effect in LiNiO2 and BaVS3, two layered oxides with triangular planes, we study the SU(4) symmetric spin-orbital model on the triangular lattice. Upon reducing the next-nearest neighbour coupling, we show that the system undergoes a quantum phase transition to a liquid phase. A variational approach to this liquid phase shows that simple types of long-range correlations are suppressed, suggesting that it is stable against lattice distortions.
5 pages, 5 figures, RevTex4

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Strongly Correlated Electrons, Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/20482

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0212211
 http://arxiv.org/abs/cond-mat/0212211
 Phys. Rev. B 68, 012408 (2003)
 doi:10.1103/PhysRevB.68.012408

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arXiv