Ground State of a Spin System with Two- and Four-spin Exchange Interactions on the Triangular Lattice

Details Ground State of a Spin System with Two- and Four-spin Exchange Interactions on the Triangular Lattice Ground State of a Spin System with Two- and Four-spin Exchange Interactions on the Triangular Lattice

1997-08-19

arxiv.org/abs/cond-mat/9708140v1

Z. Phys. B 103 (1997) 485-489

Physics

Condensed Matter

5 pages, Revtex

Scientific paper

10.1007/s002570050403

We study a spin system with both two- and four-spin exchange interactions on the triangular lattice as a possible model for the nuclear magnetism of solid $^3$He layers adsorbed on grafoil. The ground state is analyzed by the use of the mean-field approximation. It is shown that the four-sublattice state is favored by introduction of the four-spin exchange interaction. A possible phase transition at a finite temperature into a phase with the scalar chirality is predicted. Application of a magnetic field is shown to cause a variety of phase transitions.

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