O/Rh(100) p(2x2)->c(2x2) order-disorder phase transition

被引：25

作者：

Baraldi, A ^{[1
]}

Dhanak, VR ^{[1
]}

Comelli, G ^{[1
]}

Prince, KC ^{[1
]}

Rosei, R ^{[1
]}

机构：

[1] UNIV TRIESTE,DIPARTMENTO FIS,I-34127 TRIESTE,ITALY

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.53.4073

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An order-disorder transition of oxygen adsorbed on the Rh(100) surface has been studied by means of spot profile analysis low-energy electron diffraction (SPA-LEED). The p(2X2)-->c(2X2) transition has been found to belong to the Ising universality class, with critical temperature 450+/-5 K. Careful consideration of the profile broadening allows the determination of the type of defect implicated in the disordering process, and it is defined in terms of a surface Burgers vector. Furthermore, the thermodynamic parameters allow an energy/unit length to be associated with these defects.

引用

页码：4073 / 4077

页数：5

共 26 条

[1]

BARALDI A, IN PRESS APPL SURF S

[2]

BAUER E, 1987, CHEMISORBED LAYERS S, V2

[3] THE (2X2) P2MG TO (1X2) O/RH(110) PHASE-TRANSITION [J].