Finite-size behaviour of generalized susceptibilities in the whole phase plane of the Potts model

被引：0

作者：

潘雪 ^{[1
,2
]}

张雁华 ^{[2
]}

陈丽珠 ^{[3
]}

许明梅 ^{[2
]}

吴元芳 ^{[2
]}

机构：

[1] School of Electronic Engineering, Chengdu Technological University

[2] Key Laboratory of Quark and Lepton Physics and Institute of Particle Physics(MOE) , Central China Normal University

[3] School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology

来源：

Chinese Physics C | 2018年 / 42卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Potts model; critical point; generalized susceptibilities;

D O I：

暂无

中图分类号：

O572.243 [];

学科分类号：

摘要：

We study the sign distribution of generalized magnetic susceptibilities in the temperature-external magnetic field plane using the three-dimensional three-state Potts model. We find that the sign of odd-order susceptibility is opposite in the symmetric(disorder) and broken(order) phases, but that of the even-order one remains positive when it is far away from the phase boundary. When the critical point is approached from the crossover side, negative fourth-order magnetic susceptibility is observable. It is also demonstrated that non-monotonic behavior occurs in the temperature dependence of the generalized susceptibilities of the energy. The finite-size scaling behavior of the specific heat in this model is mainly controlled by the critical exponent of the magnetic susceptibility in the three-dimensional Ising universality class.

引用

页码：112 / 117

页数：6

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