Quantized Conductance of a Single Magnetic Atom
arXiv:0809.3567 · doi:10.1103/PhysRevLett.102.086805
Abstract
A single Co atom adsorbed on Cu(111) or on ferromagnetic Co islands is contacted with non-magnetic W or ferromagnetic Ni tips in a scanning tunneling microscope. When the Co atom bridges two non-magnetic electrodes conductances of 2e^2/h are found. With two ferromagnetic electrodes a conductance of e^2/h is observed which may indicate fully spin-polarized transport.
3 pages, 2 figures