Competing classical and quantum effects in shape relaxation of a metallic island

被引：42

作者：

Okamoto, H ^{[1
]}

Chen, DM

Yamada, T

机构：

[1] Harvard Univ, Rowland Inst Harvard, Cambridge, MA 02142 USA

[2] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.89.256101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Pb islands grown on a Si substrate transform at room temperature from a flattop facet geometry into an unusual ring shape. The volume-preserving mass transport is catalyzed by the electrical field from the tip of a scanning tunneling microscope. The ring morphology results from the competing classical and quantum effects in the shape relaxation. The latter is enhanced by the large anisotropy of the effective mass, and leads to a sequential strip-flow growth on alternating strips of the same facet defined by substrate steps, showing its dynamical impact on the stability of a nanostructure.

引用

页数：4

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