| speaker: | Avraham Schiller Racah Institute of Physics, The Hebrew University , Jerusalem 91904, Israel |
| time: | Tu. 01.04.03, 11:00 - 12:00 |
The rapid advancement of scanning tunneling microscopy and spectroscopy techniques has opened exciting new possibilities for the study of the Kondo effect on metallic surfaces. Most notably, it is now possible to spatially resolve the electronic structure around isolated magnetic adatoms, near small clusters of magnetic adatoms, and in quantum resonators containing magnetic adatoms (the so-called quantum mirage). This talk will present a general approach to theoretically describe the scanning tunneling spectra near magnetic adatoms, with an emphasize on the emergence of a Fano line shape, and the physical parameters governing the observed spectra. Following the discussion of a single isolated magnetic adatom, a microscopic theory will given for the quantum mirage, namely the projection of the Kondo resonance in an elliptic corral from one focus of the ellipse to the other.