Spin-Polarized STM for a Kondo adatom

Abstract

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.

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Cited by in corpus (2)

• Thermal dependence of the zero-bias conductance through a nanostructure
• Quantum size effects in Pb layers with absorbed Kondo adatoms: Determination of the exchange coupling constant