Possible chiral phase transition in two-dimensional solid $^3$He

Details Possible chiral phase transition in two-dimensional solid $^3$He Possible chiral phase transition in two-dimensional solid $^3$He

1997-08-19

arxiv.org/abs/cond-mat/9708141v1

Phys. Rev. Lett. 79, 2081 (1997)

Physics

Condensed Matter

4 pages, Revtex, 4 figures, to appear in Phys.Rev.Lett

Scientific paper

10.1103/PhysRevLett.79.2081

We study a spin system with two- and four-spin exchange interactions on the triangular lattice, which is a possible model for the nuclear magnetism of solid $^3$He layers. It is found that a novel spin structure with scalar chiral order appears if the four-spin interaction is dominant. Ground-state properties are studied using the spin-wave approximation. A phase transition concerning the scalar chirality occurs at a finite temperature, even though the dimensionality of the system is two and the interaction has isotropic spin symmetry. Critical properties of this transition are studied with Monte Carlo simulations in the classical limit.

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