Spectroscopic and magnetic mirages of impurities in nanoscopic systems

Abstract:

Exact many-body calculation for impurities in nanoscopic systems with focusing properties was carried out. The spectroscopic characteristic of the Kondo impurity, a pseudogap at the Fermi energy in the spectral density of conduction electrons, was reproduced at the antipodes of the impurity location giving rise to a spectroscopic mirage of the impurity in the sphere. The results also show that impurities with a large hybdridization give rise to spectroscopic mirages as well. The exact spin-spin correlations in small systems were also calculated using different focusing geometries.

Año de publicación:

2002

Keywords:

Fuente:

scopus