Atom Transfer and Single-Adatom Contacts
强关联电子
2016-08-16 v1 介观与纳米尺度物理
摘要
The point contact of a tunnel tip approaching towards Ag(111) and Cu(111) surfaces is investigated with a low temperature scanning tunneling microscope. A sharp jump-to-contact, random in nature, is observed in the conductance. After point contact, the tip-apex atom is transferred to the surface, indicating that a one-atom contact is formed during the approach. In sharp contrast, the conductance over single silver and copper adatoms exhibits a smooth and reproducible transition from tunneling to contact regime. Numerical simulations show that this is a consequence of the additional dipolar bonding between the homoepitaxial adatom and the surface atoms.
引用
@article{arxiv.cond-mat/0412249,
title = {Atom Transfer and Single-Adatom Contacts},
author = {L. Limot and J. Kröger and R. Berndt and A. Garcia-Lekue and W. A. Hofer},
journal= {arXiv preprint arXiv:cond-mat/0412249},
year = {2016}
}
备注
4 pages, 4 figures