TRANSITION FROM ONE-DIMENSIONAL TO 2-DIMENSIONAL GROWTH OF CU ON PD(110) PROMOTED BY CROSS-EXCHANGE MIGRATION

被引：57

作者：

BUCHER, JP ^{[1
]}

HAHN, E ^{[1
]}

FERNANDEZ, P ^{[1
]}

MASSOBRIO, C ^{[1
]}

KERN, K ^{[1
]}

机构：

[1] EPF LAUSANNE,PHB ECUBLENS,INST PHYS EXPTL,CH-1015 LAUSANNE,SWITZERLAND

来源：

EUROPHYSICS LETTERS | 1994年 / 27卷 / 06期

关键词：

D O I：

10.1209/0295-5075/27/6/011

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A transition from one- to two-dimensional structures is observed in the growth of Cu islands on Pd(110). When Cu is deposited at substrate temperatures below 300 K, the adatoms move along the easy [11BAR0] direction forming 1D Cu chains. At higher temperatures transverse diffusion of adatoms is activated and 2D islands start to grow. Migration barriers are found to be (0.51 +/- 0.05) eV and (0.75 +/- 0.07) eV along and across the [11BAR0] directions, respectively. In the two-component driven diffusion regime, the shape of the 2D Cu islands is determined by the energy difference of the two orthogonal diffusion barriers.

引用

页码：473 / 478

页数：6

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