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arXiv 1005.1950cond-mat.stat-mech
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J FN SN伊辛模型Phase Diagram的双临界中心点

Bi-Critical Central Point Of J FN -J SN Ising Model Phase Diagram

Y. Boughaleb, M. Noureddine, R. Nassif

摘要:

当有序域之间的界面是有序簇时,挫折感就消失了。一个具有混合有序结构的相出现,但没有长度尺度可以关联到。我们表明,每个结构的密度之和起着序参量的作用。对于,我们考虑一个规则的半满格与排斥相互作用扩展到第二个相邻的粒子。当第二和第一相邻相互作用能之比R= JSN/JFN <0.5时,有序结构为p(2X2);当R>0.5时,有序结构为简并p(2X 1)/p(1X 2)。基态与另一个名为p(4X 2)/p(2X 4)的基态共存于中心双临界点:当在非阻挫有序相之间通过时,穿过的状态。

英文摘要:

When interfaces between ordered domains are ordered clusters, frustration disappears. A phase with mixed ordered structures emerges but no length scale can be associated to. We show that sum of densities of each structure plays the role of order parameter. For, we consider a regular half full lattice with repulsive interaction extended to second neighboring particles. Ordered structures are p(2X2) when ratio between second and first neighboring interaction energies R=J SN /J FN <0.5 and degenerate p(2X1)/p(1X2) for R>0.5. The ground states coexist with another named p(4X2)/p(2X4) at central bi-critical point: a state to cross when passing between non-frustrated ordered phases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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