On the ferromagnetic phase breakdown of a two-dimensional Ising model with competing interactions
作者： J R L de Almeida , I P Fittipaldi , F C Sa Barreto
DOI: 10.1088/0022-3719/14/13/004
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摘要: The authors study a quenched random Ising magnet with nearest-neighbour exchange interactions jij=+or-J on square lattice at T=0. A new-type effective field approach beyond mean field-approximation is used in order to obtain an estimate for the critical antiferro-magnetic bond concentration pc which ferromagnetic phase breaks down. result quite good agreement Bethe, Monte Carlo and replica method calculations. Edwards-Anderson parameter q within formulation also obtained. They found that both magnetisation vanish same value pc=1/6.
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sci-hub.se 参考文章(16)
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