THEORY OF THE LOCAL DENSITY OF SURFACE-STATES ON A METAL - COMPARISON WITH SCANNING TUNNELING SPECTROSCOPY OF A AU(111) SURFACE

被引：134

作者：

DAVIS, LC ^{[1
]}

EVERSON, MP ^{[1
]}

JAKLEVIC, RC ^{[1
]}

SHEN, WD ^{[1
]}

机构：

[1] NE MISSOURI STATE UNIV,DIV SCI,KIRKSVILLE,MO 63501

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.43.3821

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A simple theory of the effect of monatomic steps on the local density of surface states and on the conductance of a scanning tunneling microscope (STM) has been developed. This theory is based upon reflection and transmission amplitudes for surface electron waves. It is assumed that a step acts as a repulsive barrier, which is entirely consistent with experimental observations on the (111) surface of a Au single crystal. Comparison to experiment has been made for a flat surface to establish that the model for the tip and barrier is adequate. The theory for the conductance with the STM tip near a single step and in the center of a pit is shown to agree well with experiment. Theoretical results are also presented for a periodic array of steps for which one-dimensional Kronig-Penney bands should be observable, especially at reduced temperature.

引用

页码：3821 / 3830

页数：10