Physical Aspects of Nanoelectronics, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands.
J Phys Condens Matter. 2010 Jul 7;22(26):264004. doi: 10.1088/0953-8984/22/26/264004. Epub 2010 Jun 14.
The dynamics of two types of atomic seesaws are studied by open feedback loop scanning tunneling microscopy. The first type of atomic seesaw is a regular Ge dimer of the dimer reconstructed Ge(001) surface and the second type of atomic seesaw is a dimer located on the ridges of Au induced nanowires on a Ge(001) surface. On the bare Ge(001) surface the flip-flop motion of the dimers is induced by phasons, which perform a one-dimensional random walk along the substrate dimer rows. The phasons on the Au induced nanowires ridges are pinned and therefore only a limited number of dimers exhibit flip-flop behavior for the Au/Ge(001) system.
通过开环反馈扫描隧道显微镜研究了两种类型的原子跷跷板的动力学。第一种原子跷跷板是重构的 Ge(001)表面上的规则 Ge 二聚体，第二种原子跷跷板是位于 Ge(001)表面上的 Au 诱导纳米线脊上的二聚体。在裸露的 Ge(001)表面上，通过位错诱导二聚体的翻转运动，位错沿基底二聚体行进行一维随机行走。在 Au 诱导纳米线脊上的位错被钉扎，因此对于 Au/Ge(001)系统，只有有限数量的二聚体表现出翻转行为。
