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物理学报. 1986, 35(1): 104-109.
doi: 10.7498/aps.35.104.
W(112)p(2×1)-O化学吸附系统有序-无序相变的重整化群理论分析
- 收稿日期: 1985-01-11
- 刊出日期: 2005-07-14
摘要: 用位置空间的重整化群方法,讨论W(112)p(2×1)-O化学吸附系统的有序-无序相变。采用周期性集团的递推关系,进行了将格点组成单胞,再将单胞组成周期性集团的4×4重整化变换,考虑最近邻、次近邻氧原子之间的对相互作用以及三个氧原子之间和四个氧原子之间的相互作用,求出重整化群耦合参数K′α和格点间相互作用参数Kα之间的关系,确定了固定点Kα*求出不同覆盖度下的临界温度Tc,得到与实验结果相符合的W(112)p(2×1)-O相图。
English Abstract
RENORMALIZATION GROUP STUDY OF ORDER-DISORDER TRANSITIONS IN THE W(112)p(2×l)-O SYSTEM
- Received Date:
11 January 1985
- Published Online:
14 July 2005
Abstract: The position-space renormalization group method is employed to investigate the order-disorder transitions in the W(112)p(2×1)-O system. The recursion relations are based on the periodically continued cluster of four cells with four sites each. We consider the pairwise interactions between nearest, nextnearest neighbours as well as the three-particle and four-particle interactions and formulate the relationships between renormalized coupling parameters K′a and interaction constants Ka. From the renormalization iteration, we find the fixed point Ka* and the critical temperature Tc for various monolayer coverages. The phase diagram of the W(112)p(2×l)-O overlayer obtained is found to be in agreement with the existing experimental results.
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