Order-disorder transition of the c (2x2) phase in the Pb/Cu(110) system: Significance of surface defects

被引：12

作者：

Georgiev, N ^{[1
]}

Michailov, M ^{[1
]}

机构：

[1] Bulgarian Acad Sci, Inst Phys Chem, BU-1113 Sofia, Bulgaria

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.58.13895

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The tight-binding method has been combined with Monte Carlo simulations to study the structure and order-disorder transition of a Pb half-monolayer on a Cu(110) surface. Using coverage dependent lateral interactions a low-temperature c(2 x 2) structure and its transition to a disordered state was obtained. The general behavior of the two-dimensional (2D) order-disorder transition was found to be in very close agreement with experimental findings. Equilibrium surface Pb-Cu alloying was also observed during the disordering transition. The critical behavior of the system is shown to depend crucially on the initial order in the 2D overlayer: a continuous Ising type with initially perfect c(2 x 2) ordering, and first-order when in the initial configuration of the adlayer, has "frozen-in" distortions. [S0163-1829(98)03740-0].

引用

页码：13895 / 13900

页数：6

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