TEMPERATURE-DEPENDENT ORDER OF CLEAN PD(110)

被引：11

作者：

HORNIS, H ^{[1
]}

WEST, JD ^{[1
]}

CONRAD, EH ^{[1
]}

ELLIALTIOGLU, R ^{[1
]}

机构：

[1] BILKENT UNIV,DEPT PHYS,ANKARA 06533,TURKEY

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.48.14577

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report high resolution low-energy-electron-diffraction measurements on the Pd(110) surface. We demonstrate that the clean surface consists of semiordered islands. The island structure is stable up to 650-degrees-C at which point the island edges roughen and step-step correlations decrease. Above 1100-degrees-C, surface evaporation becomes important and the surface becomes kinetically rough. A simple model is presented that makes use of step-step interactions to generate the periodic island structure. This model predicts that ordered islands form below the roughening temperature if the step creation energy is small compared to the step-step interaction. The existence of isolated steps is shown to be consistent with embedded atom calculations that predict a small step-formation energy on Pd(110) surfaces.

引用

页码：14577 / 14583

页数：7

共 33 条

[1] SPONTANEOUS FORMATION OF STRESS DOMAINS ON CRYSTAL-SURFACES [J].