3 research outputs found
Quantum Phase Transition in the SU(4) Spin-Orbital Model on the Triangular Lattice
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.Comment: 5 pages, 5 figures, RevTex