ELECTRONIC SUPERSTRUCTURES ON THE GRAPHITE SURFACE OBSERVED BY SCANNING-TUNNELING-MICROSCOPY - AN INTERFERENCE MODEL

被引：32

作者：

VALENZUELABENAVIDES, J

DELAGARZA, LM

机构：

[1] Instituto de Física, Universidad Nacional Autónoma de México, Laboratorio de Ensenada, Ensenada, 22800 BC

来源：

SURFACE SCIENCE | 1995年 / 330卷 / 02期

关键词：

COMPUTER SIMULATIONS; GRAPHITE; LOW INDEX SINGLE CRYSTAL SURFACES; SCANNING TUNNELING MICROSCOPY; SURFACE ELECTRONIC PHENOMENA;

D O I：

10.1016/0039-6028(95)00240-5

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：

Electron-density superstructures (SS) on highly oriented pyrolytic graphite (HOPG) have long been observed near surface defects and surrounding metal particles by scanning tunneling microscopoy (STM). Xhie et al. analyzed and catalogued ten such SS near Pt particles on HOPG [Phys. Rev. B 43 (1991) 8917]. Mizes and Foster suggested that the SS are the result of interference between the normal electron waves and waves scattered by the metal particle [Science 244 (1989) 559]. This suggestion was used by Shedd and Russell to introduce an interference model using simple electron wave functions and simulated two of the most commonly observed SS [Surf. Sci. 266 (1992) 259]. With this work we find that, by introducing a more general form for the electron wave functions and by considering multiple component interference, we can simulate many of the complex SS observed by STM, supporting the assertion that these SS are of an electronic nature and not a real surface reconstruction.

引用

页码：227 / 233

页数：7

共 12 条

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