We use a variational method to study the phase structure of the three-dimensional Z ( 3 ) spin model with nearest neighbour and next nearest couplings. The system shows a rich phase diagram. The order and location of the corresponding phase transitions in the ferromagnetic region is compared with a Monte Carlo analysis and found in good agreement with the analytical prediction. We have also found that a region where the phase transition is second order does exist.
Phase-diagram of the Z(3) Spin Model In 3 Dimensions
MARINI BETTOLO MARCONI, Umberto;
1989-01-01
Abstract
We use a variational method to study the phase structure of the three-dimensional Z ( 3 ) spin model with nearest neighbour and next nearest couplings. The system shows a rich phase diagram. The order and location of the corresponding phase transitions in the ferromagnetic region is compared with a Monte Carlo analysis and found in good agreement with the analytical prediction. We have also found that a region where the phase transition is second order does exist.File in questo prodotto:
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