N -石蜡中RV - RI相变的拓扑性质

IF 2.9 4区工程技术 Q1 MULTIDISCIPLINARY SCIENCES

Advanced Theory and Simulations Pub Date : 2025-10-14 DOI:10.1002/adts.202500995

Soumya Kanti Ganguly, Sumanta Mukherjee, Prabir K. Mukherjee

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引用次数: 0

摘要

利用正交六边形晶格上的XY模型研究了旋转相系的相变。与与人字形参数振幅耦合引起的一阶行为相反，研究表明，在没有人字形参数振幅的情况下，这种转变是二阶的，由BKT涡介导。利用低温和高温膨胀、Villain对偶性和蜂窝晶格上的模拟，发现理论和数值之间的密切一致。分析得到的BKT转变温度与模拟结果的匹配度在13%以内，证实了这种拓扑转变的普遍性。

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The Topological Nature of RV − RI Phase Transition in N‐Paraffins

The phase transition is investigated in rotator phase systems using the XY model on an orthohexagonal lattice. In contrast to the first‐order behavior induced by coupling with the Herringbone order parameter amplitude, it is showed that, in its absence, the transition is second‐order and mediated by BKT vortices. Employing low‐ and high‐temperature expansions, Villain duality, and simulations on an honeycomb lattice, a close agreement between theory and numerics is found. The BKT transition temperature obtained from analytics matches simulation results within 13%, confirming the universality of this topological transition.

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来源期刊

Advanced Theory and Simulations Multidisciplinary-Multidisciplinary

CiteScore

5.50

自引率

3.00%

发文量

221

期刊介绍： Advanced Theory and Simulations is an interdisciplinary, international, English-language journal that publishes high-quality scientific results focusing on the development and application of theoretical methods, modeling and simulation approaches in all natural science and medicine areas, including: materials, chemistry, condensed matter physics engineering, energy life science, biology, medicine atmospheric/environmental science, climate science planetary science, astronomy, cosmology method development, numerical methods, statistics