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

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

2002-12-10

arxiv.org/abs/cond-mat/0212211v1

Phys. Rev. B 68, 012408 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures, RevTex4

Scientific paper

10.1103/PhysRevB.68.012408

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.

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