期刊
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
卷 54, 期 38, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1751-8121/ac1c39
关键词
binary lattice-gases of interacting particles; annealed disorder; order-disorder and symmetry-breaking transitions; Bethe lattice; Husimi lattice
资金
- Polish National Agency for Academic Exchange (NAWA) [PPN/ULM/2019/1/00160]
- National Academy of Sciences of Ukraine [KPiKBK 6541230]
This study focuses on the equilibrium properties and phase transition characteristics of binary lattice-gases, including exchanges and interactions. For tree-like Bethe and Husimi lattices, the full phase diagram of a ternary mixture of particles and voids was determined.
We study equilibrium properties of binary lattice-gases comprising A and B particles, which undergo continuous exchanges with their respective reservoirs, maintained at chemical potentials mu ( A ) = mu ( B ) = mu. The particles interact via on-site hard-core exclusion and also between the nearest-neighbours: there are a soft repulsion between AB pairs and also interactions of arbitrary strength J, positive or negative, for AA and BB pairs. For tree-like Bethe and Husimi lattices we determine the full phase diagram of such a ternary mixture of particles and voids. We show that for J being above a lattice-dependent threshold value, the critical behaviour is similar: the system undergoes a transition at mu = mu (c) from a phase with equal mean densities of species into a phase with a spontaneously broken symmetry, in which the mean densities are no longer equal. Depending on the value of J, this transition can be either continuous or of the first order. For sufficiently large negative J, the behaviour on the two lattices becomes markedly different: on the Bethe lattice there exist two separate phases with different kinds of structural order, which are absent on the Husimi lattice, due to stronger frustration effects.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据