Structural phase transitions in two-dimensional systems: Pb/Ge(111) and Sn/Ge(111)

被引：5
|
作者：
Cano, A [1 ]
Levanyuk, AR [1 ]
Michel, EG [1 ]
机构：
[1] Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain
来源：
ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 2005年 / 220卷 / 08期
关键词：
phase transitions; surfaces; defects; Landau theory;
D O I：
10.1524/zkri.220.8.663.67072
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The adsorption systems Pb/Ge(I 11) and Sn/Ge(I 11) exhibit temperature induced structural phase transitions. We report here a phenomenological analysis of these phase transitions starting from Landau theory. On the basis of symmetry arguments, we show that essential differences are expected theoretically for the critical behavior of the two interfaces. The influence of hopping defects in these systems is treated using a Landau-like approach. This approach gives us a consistent and general manner to interpret the existing experimental data for these interfaces.
引用
收藏
页码：663 / 671
页数：9
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