STM-study of Gd/W(110) at submonolayer coverages

被引：17

作者：

Pascal, R

Zarnitz, C

Bode, M

Wiesendanger, R

机构：

[1] UNIV HAMBURG,INST PHYS APPL,D-20355 HAMBURG,GERMANY

[2] UNIV HAMBURG,MICROSTRUCT RES CTR,D-20355 HAMBURG,GERMANY

来源：

SURFACE SCIENCE | 1997年 / 385卷 / 2-3期

关键词：

lanthanides; scanning tunneling microscopy; surface electronic phenomena; surface structure and morphology; tungsten;

D O I：

10.1016/S0039-6028(97)00431-7

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：

We have studied the growth of Gd on a W(110) substrate at submonolayer coverages by means of scanning tunneling microscopy (STM). Gd forms domains of equidistant chains along the [1(1) over bar0$] direction of the substrate. The distance between the chains decreases in discrete steps with increasing coverage. These chain-like superstructures coincide with the appearance of (n x 2) LEED-patterns (n = 10, 8, 7, 6, 5). Atomically resolved STM images support an earlier model which explains the chains by periodic adsorption in on-top and non-top sites. The apparent corrugation of the chains exhibits a strong bias dependence which can be explained by adsorption-site-dependent local electronic properties. Spatially resolved spectroscopy of the local barrier height is in excellent qualitative agreement with earlier spatially averaging experiments. (C) 1997 Elsevier Science B.V.

引用

页码：L990 / L996

页数：7

共 10 条

[1] SCANNING-TUNNELING-MICROSCOPY OBSERVATION OF K-INDUCED RECONSTRUCTIONS ON AU(110) [J].