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arXiv 1809.08129cond-mat.stat-mech
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三角格子三态Potts模型的态密度和基态磁序

Density of states and ground state magnetic ordering of the triangular lattice three-state Potts model

Magomed A. Magomedov, Akay K. Murtazaev

摘要:

采用Monte Carlo方法研究了最近邻(J1)和次最近邻(J2)之间存在不同交换作用的三角晶格上三态Potts模型的低温磁有序和相变.计算了不同J_1和J_2时的态密度。得到了不同J_1和J_2的基态磁结构。计算了临界温度,确定了相变的级数。用态密度差和直方图分析方法研究了相变的顺序。确定了受抑区域。结果表明,当J_1为负值时,基态的高度简并区为全阻挫区-1<= J_2/abs(J_1)<=-0.2。对于正的J_1,阻挫发生在区域-1<= J_2/J_1 <=-0.5,但仅在点J_2/J_1 =-1处,系统具有高度退化并完全阻挫。给出了三态三角Potts模型的相图。

英文摘要:

This study present a Monte Carlo investigations of low-temperature magnetic ordering and phase transitions in three-state Potts model on triangular lattice with various exchange interactions between nearest (J1) and next-nearest (J2) neighbors. The density of states for varying J1 and J2 are calculated. The magnetic structure of the ground state for various J1 and J2 are obtained. The critical temperature are calculated and the order of the phase transition determined. The density of states difference (DOSD) and histogram analysis method are used to investigate the order of the phase transitions. The frustrated regions are determined. It is shown, that for negative J1 the high degeneration of the ground state are in fully frustrated area -1<=J2/abs(J1)<=-0.2. For positive J1 frustration are occurred in area -1<=J2/J1<=-0.5, but only in point J2/J1=-1 the system have a high degeneration and are fully frustrated. The phase diagram of the three-state triangular Potts model are show.

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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