Nematic and chiral orders for planar spins on triangular lattice

Details Nematic and chiral orders for planar spins on triangular lattice Nematic and chiral orders for planar spins on triangular lattice

2008-04-25

arxiv.org/abs/0804.4034v2

Phys. Rev. Lett 101, 167202(2008)

Physics

Condensed Matter

Strongly Correlated Electrons

minor changes

Scientific paper

10.1103/PhysRevLett.101.167202

We propose a variant of the antiferromagnetic XY model on the triangular lattice to study the interplay between the chiral and nematic orders in addition to the magnetic order. The model has a significant bi-quadratic interaction of the planar spins. When the bi-quadratic exchange energy dominates, a large temperature window is shown to exist over which the nematic and the chiral orders co-exist without the magnetic order, thus defining a chiral-nematic state. The phase diagram of the model and some of its critical properties are derived by means of the Monte Carlo simulation.

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