Ising antiferromagnets on honeycomb and square lattices in the critical magnetic field
Journal of the Korean Physical Society(2013)
摘要
The important properties of the Ising antiferromagnets on honeycomb lattice and square lattice in the critical magnetic field B c ( B c = 3| J | for honeycomb lattice and B c = 4| J | for square lattice with coupling constant J ) are investigated by evaluating exactly all their possible ground states on L × 2 L honeycomb lattices ( L = 4 ∼ 14) and L × L square lattices ( L = 4 ∼ 16) with cylindrical boundary conditions. In particular, the properties of the honeycomb-lattice Ising antiferromagnet in the critical magnetic field B c are unveiled for the first time.
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关键词
Ising antiferromagnets, Critical magnetic field
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