Mapping Itinerant Electrons around Kondo Impurities

Abstract

We investigate single Fe and Co atoms buried below a Cu(100) surface using low temperature scanning tunneling spectroscopy. By mapping the local density of states of the itinerant electrons at the surface, the Kondo resonance near the Fermi energy is analyzed. Probing bulk impurities in this well-defined scattering geometry allows separating the physics of the Kondo system and the measuring process. The line shape of the Kondo signature shows an oscillatory behavior as a function of depth of the impurity as well as a function of lateral distance. The oscillation period along the different directions reveals that the spectral function of the itinerant electrons is anisotropic.

5 pages, 4 figures, accepted by Physical Review Letters

References in corpus (3)

• Energy resolution and discretization artefacts in the numerical renormalization group
• Long-range Kondo signature of a single magnetic impurity
• Friedel oscillations and the Kondo screening cloud

Cited by in corpus (4)

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• Shifting the Voltage Drop in Electron Transport through a Single Molecule
• Friedel oscillations induced by magnetic skyrmions: from scattering properties to all-electrical detection
• Dimensionality effects in the LDOS of ferromagnetic hosts probed via STM: spin-polarized quantum beats and spin filtering