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arXiv 2007.03491cond-mat.stat-mech
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一般自旋$S$ kagome晶格Ising反铁磁体中长程有序的缺失

Absence of long-range order in a general spin-$S$ kagome lattice Ising antiferromagnet

M. Semjan, M. Žukovič

摘要:

用蒙特卡罗模拟研究了在可果美晶格上的伊辛反铁磁体(IAKL)中,由于局域自由度(自旋值$S$)的多重数增加而出现某种长程有序(LRO)的可能性.特别地,从有限尺寸标度分析获得的自旋关联函数的临界指数针对包括$S=\infty$的$S$的各种值进行评估,目标是确定是否存在自旋$S_C$的某个阈值,在该阈值以上,系统将显示真实或准LRO,类似于三角晶格上的相关模型(IATL)。结果发现,与IATL的情况下,IAKL模型保持无序的任何自旋值和任何有限的温度。

英文摘要:

The possibility of the emergence of some kind of long-range ordering (LRO) due to the increase of multiplicity of the local degrees of freedom (spin value $S$) is studied in an Ising antiferromagnet on a kagome lattice (IAKL) by Monte Carlo simulation. In particular, the critical exponent of the spin correlation function, obtained from a finite-size scaling analysis, is evaluated for various values of $S$, including $S=\infty$, with the goal to determine whether there exists some threshold value of the spin $S_C$ above which the system would show true or quasi-LRO, similar to a related model on a triangular lattice (IATL). It is found that, unlike in the IATL case, the IAKL model remains disordered for any spin value and any finite temperature.

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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