Direct observation of soliton dynamics in charge-density waves on a quasi-one-dimensional metallic surface

被引：44

作者：

Morikawa, H ^{[1
]}

Matsuda, I ^{[1
]}

Hasegawa, S ^{[1
]}

机构：

[1] Univ Tokyo, Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 08期

基金：

日本学术振兴会;

关键词：

D O I：

10.1103/PhysRevB.70.085412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A periodic array of metallic In atomic chains on a Si(111) surface, 4x1-In superstructure, has been investigated by scanning tunneling microscopy at 6 K. We have found a lack of one-to-one correspondence between the filled- and empty-state images, meaning that the charge distribution is pinned on the frozen lattice in two ways. This supports the charge-density-wave (CDW) model rather than an order-disorder model, or a structural transition model, for the 4x1 (room temperature) to 8x'2' (low temperature) phase transition occurring on this surface. Furthermore, dynamics of a soliton in the CDW has been observed, which is characteristic of this kind of quasi-one-dimensional system.

引用

页码：085412 / 1

页数：6

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