Interacting dimers on the honeycomb lattice: An exact solution of the five-vertex model

被引:22
作者
Huang, HY
Wu, FY
Kunz, H
Kim, D
机构
[1] ECOLE POLYTECH FED LAUSANNE,INST PHYS THEOR,CH-1015 LAUSANNE,SWITZERLAND
[2] SEOUL NATL UNIV,CTR THEORET PHYS,SEOUL 151742,SOUTH KOREA
来源
PHYSICA A | 1996年 / 228卷 / 1-4期
基金
美国国家科学基金会;
关键词
D O I
10.1016/S0378-4371(96)00057-X
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The problem of close-packed dimers on the honeycomb lattice was solved by Kasteleyn in 1963. Here we extend the solution to include interactions between neighboring dimers in two spatial lattice directions, The solution is obtained by using the method of Bethe ansatz and by converting the dimer problem into a five-vertex problem. The complete phase diagram is obtained and it is found that a new frozen phase, in which the attracting dimers prevail, arises when the interaction is attractive. For repulsive dimer interactions a new first-order line separating two frozen phases occurs. The transitions are continuous and the critical behavior in the disorder regime is found to be the same as in the case of noninteracting dimers characterized by a specific heat exponent alpha = 1/2.
引用
收藏
页码:1 / 32
页数:32
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