2006/10/16 by N. Néel, Jens Kroeger, Neel, N. +9
Physics and Astronomy · Engineering · #Quantum and electron transport phenomena #Molecular Junctions and Nanostructures #Surface and Thin Film Phenomena
paper · pdf · doi:10.48550/arxiv.cond-mat/0610419
The tip of a low-temperature scanning tunneling microscope is brought into contact with individual Kondo impurities (cobalt atoms) adsorbed on a Cu(100) surface. A smooth transition from the tunneling regime to a point contact with a conductance of G\approxG0 occurs. Spectroscopy in the contact regime, \it i. e., at currents in a μA range was achieved. A modified line shape is observed indicating a significant change of the Kondo temperature TK at contact. Model calculations indicate that the proximity of the tip shifts the cobalt d-band and thus affects TK.