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题名: Characterization of Phase Transition in Heisenberg Fluids from Density Functional Theory
作者: Li Liang-Sheng ;  Li Li ;  陈晓松
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2009
卷号: 51, 期号:2, 页码:287-292
关键词: ORDER-DISORDER TRANSITION ;  LIQUID-VAPOR INTERFACE ;  MONTE-CARLO-SIMULATION ;  NEUTRAL HARD-SPHERES ;  DIPOLAR FLUIDS ;  MODEL ;  INSTABILITY ;  EQUATION ;  DIAGRAM
学科分类: Physics
通讯作者: Li, LS , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
部门归属: [Li, LS; Li, L; Chen, XS] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: The phase transition of Heisenberg fluid has been investigated with the density functional theory in mean-field approximation (MF). The matrix of the second derivatives of the grand canonical potential Omega with respect to the particle density fluctuations and the magnetization fluctuations has been investigated and diagonalized. The smallest eigenvalue being 0 signalizes the phase instability and the related eigenvector characterizes this phase transition. We find a Curie line where the order parameter is pure magnetization and a spinodal where the order parameter is a mixture of particle density and magnetization. Along the spinodal, the character of phase in stability changes continuously from predominant condensation to predominant ferromagnetic phase transition with the decrease of total density. The spinodal meets the Curie line at the critical end point with the reduced density rho* = rho sigma(3) = 0.224 and the reduced temperature T* = kT/epsilon = 1.87 (sigma is the diameter of Heisenberg hard sphere and epsilon is the coupling constant).
资助者: National Natural Science Foundation of China[10325418]
收录类别: SCI
WOS记录号: WOS:000263891900020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5396
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Li Liang-Sheng,Li Li,Chen Xiao-Song. Characterization of Phase Transition in Heisenberg Fluids from Density Functional Theory[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2009,51(2):287-292.
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