Step fluctuations on Pt(111) surfaces

被引：56

作者：

Giesen, M ^{[1
]}

IckingKonert, GS ^{[1
]}

Stapel, D ^{[1
]}

Ibach, H ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST GRENZFLACHENFORSCH & VAKUUMPHYS, D-52425 JULICH, GERMANY

来源：

SURFACE SCIENCE | 1996年 / 366卷 / 02期

关键词：

D O I：

10.1016/0039-6028(96)00823-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have investigated the temperature dependence of equilibrium fluctuations of monatomic steps on Pt(lll) surfaces using space and rime correlation functions. From the spatial correlation function of steps we have determined a kink energy of 0.167 +/- 0.005 eV for steps with (100) orientation. The same value was found for steps with (111) orientation. The time dependence of the correlation function obeys a t(1/4) power law, provided that the mean square of the fluctuations is in the macroscopic limit. The t(1/4) power law is indicative of mass transport along the steps. From the temperature dependence of the time fluctuations an activation energy of 1.0+/-0.16 eV is determined for the hopping of atoms along steps of either orientation.

引用

页码：229 / 238

页数：10

共 33 条

[1] THE INFLUENCE OF STEP STEP INTERACTIONS ON STEP WANDERING [J].