Exchange interaction between single magnetic adatoms
强关联电子
2007-05-23 v2 材料科学
摘要
The magnetic coupling between single Co atoms adsorbed on a copper surface is determined by probing the Kondo resonance using low-temperature scanning tunneling spectroscopy. The Kondo resonance, which is due to magnetic correlation effects between the spin of a magnetic adatom and the conduction electrons of the substrate, is modified in a characteristic way by the coupling of the neighbouring adatom spins. Increasing the interatomic distance of a Cobalt dimer from 2.56A to 8.1A we follow the oscillatory transition from ferromagnetic to antiferromagnetic coupling. Adding a third atom to the antiferromagnetically coupled dimer results in the formation of a collective correlated state.
引用
@article{arxiv.cond-mat/0611716,
title = {Exchange interaction between single magnetic adatoms},
author = {P. Wahl and P. Simon and L. Diekhoener and V. S. Stepanyuk and P. Bruno and M. A. Schneider and K. Kern},
journal= {arXiv preprint arXiv:cond-mat/0611716},
year = {2007}
}
备注
4 pages, 2 figures, 1 table