OBSERVATION OF METASTABLE STRUCTURAL EXCITATIONS AND CONCERTED ATOMIC MOTIONS ON A CRYSTAL-SURFACE

被引：47

作者：

HWANG, IS

GOLOVCHENKO, J

机构：

[1] HARVARD UNIV,DEPT PHYS,CAMBRIDGE,MA 02138

[2] ROWLAND INST SCI INC,CAMBRIDGE,MA 02142

[3] HARVARD UNIV,DIV APPL SCI,CAMBRIDGE,MA 02138

来源：

SCIENCE | 1992年 / 258卷 / 5085期

关键词：

D O I：

10.1126/science.258.5085.1119

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The addition of a small number of lead atoms to a germanium(111) surface reduces the energy barrier for activated processes, and with a tunneling microscope it is possible to observe concerted atomic motions and metastable structures on this surface near room temperature. The formation and annihilation of these metastable structural surface excitations is associated with the shift in position of large numbers of germanium surface atoms along a specific row direction like beads on an abacus. The effect provides a mechanism for understanding the transport of atoms on a semiconductor surface.

引用

页码：1119 / 1122

页数：4

共 21 条

[1] DIMER-ADATOM-STACKING-FAULT (DAS) AND NON-DAS (111) SEMICONDUCTOR SURFACES - A COMPARISON OF GE(111)-C (2X8) TO SI(111)-(2X2), SI(111)-(5X5), SI(111)-(7X7), AND SI(111)-(9X9) WITH SCANNING TUNNELING MICROSCOPY [J].