Observation of true c(8x2) symmetry in scanning tunnelling microscopy images of the clean InSb(001) surface

被引：23
|
作者：
Varekamp, PR [1 ]
Bjorkqvist, M [1 ]
Gothelid, M [1 ]
Karlsson, UO [1 ]
机构：
[1] ROYAL INST TECHNOL,DEPT PHYS MAT PHYS,S-10044 STOCKHOLM,SWEDEN
来源：
SURFACE SCIENCE | 1996年 / 350卷 / 1-3期
关键词：
indium antimonide; low index single crystal surfaces; scanning tunnelling microscopy; surface relaxation and reconstruction;
D O I：
10.1016/0039-6028(95)01343-1
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：
Filled and empty state scanning tunnelling microscopy images of the sputtered and annealed InSb(001) surface are presented. The sputter-anneal preparation generates a surface with two distinct phases. The dominant phase possesses a unit cell with true c(8 x 2) symmetry, whereas the other phase is attributed to an asymmetric 1 x 3 reconstruction. The presence of a c(8 x 2) unit cell in filled state images is in contrast to previous reports, which identified only a 4 x 1 unit cell. The true c(8 x 2) symmetry further indicates, if the available structural model is used as a guide, that the current interpretation of features in filled state images is incorrect. This result may necessitate a reevaluation of the structural model for the InSb(001)-c(8 x 2) surface.
引用
收藏
页码：L221 / L226
页数：6
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