We investigate the bias dependence of the tunneling conductance between a spin-polarized (SP) scanning tunneling microscope (STM) tip and the surface conduction states of a normal metal with a Kondo adatom. Quantum interference between tip-host metal and tip-adatom-host metal conduction paths is studied in the full range of the Fano parameter q. The spin-polarized STM gives rise to a splitting of the Kondo peak and asymmetry in the zero-bias anomaly depending on the lateral tip-adatom distance. For increasing lateral distances, the Kondo peak-splitting shows a strong suppression and the spin-polarized conductance exhibits the standard Fano-Kondo profile.
@article{arxiv.0806.1852,
title = {Spin-Polarized STM for a Kondo adatom},
author = {A. C. Seridonio and F. M. Souza and I. A. Shelykh},
journal= {arXiv preprint arXiv:0806.1852},
year = {2009}
}
Comments
new version with improved discussion. added one figure. 12 pages (one-column) + 5 figures