ANISOTROPY IN NUCLEATION AND GROWTH OF 2-DIMENSIONAL ISLANDS DURING HOMOEPITAXY ON HEX RECONSTRUCTED AU(100)

被引：87

作者：

GUNTHER, S ^{[1
]}

KOPATZKI, E

BARTELT, MC

EVANS, JW

BEHM, RJ

机构：

[1] UNIV ULM, OBERFLACHENCHEM & KATALYSE ABT, D-89069 ULM, GERMANY

[2] IOWA STATE UNIV SCI & TECHNOL, AMES LAB, DEPT MATH, AMES, IA 50011 USA

[3] IOWA STATE UNIV SCI & TECHNOL, AMES LAB, INST PHYS RES & TECHNOL, AMES, IA 50011 USA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.73.553

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present results of a comprehensive scanning tunneling microscopy study of the nucleation and growth of Au islands on Au(100). It is shown that the reconstruction of the substrate produces strong anisotropic effects. Rate equation analysis of the experimental flux and temperature dependence of the island density suggests: (i) a critical size of i = 3 for T = 315-380 K, but i > 3 above 400 K; and (ii) strongly anisotropic diffusion, preferentially parallel to the reconstruction rows (activation energy approximately 0.2 eV). We comment on energetic and kinetic aspects of the observed island shape anisotropy.

引用

页码：553 / 556

页数：4

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