Phase diagram of the antiferromagnetic XY model with a triangular lattice in an external magnetic field
- 20 October 1986
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 19 (29) , 5927-5935
- https://doi.org/10.1088/0022-3719/19/29/014
Abstract
The ordered states of a planar antiferromagnet with a triangular lattice are investigated in the presence of a magnetic field. The spin wave free energy is taken into account and proved to be important for determining the properties of the system. The phase diagram is constructed. It contains four different phases with rigorous long-range order. Three of them are characterised by different configurations of mean magnetic moments for the three substances. The existence of one or more non-trivial phase with an algebraic decay of the correlation functions is very probable.Keywords
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