IFIR 05409
INSTITUTO DE FISICA DE ROSARIO
Unidad Ejecutora - UE
artículos
Título:
From tunneling to contact in a magnetic atom: The non-equilibrium Kondo effect
Autor/es:
D. J. CHOI; N. LORENTE; L. LIMOT; P. N. ABUFAGER
Revista:
JOURNAL OF CHEMICAL PHYSICS
Editorial:
AMER INST PHYSICS
Referencias:
Lugar: New York; Año: 2017 vol. 146
ISSN:
0021-9606
Resumen:
A low-temperature scanning tunneling microscope was employed to study the differential conductancein an atomic junction formed by an adsorbed Co atom on a Cu(100) surface and a copper-covered tip. Azero-bias anomaly (ZBA) reveals spin scattering off the Co atom, which is assigned to a Kondo effect.The ZBA exhibits a characteristic asymmetric lineshape when electrons tunnel between tip and sample,while upon the tip-Co contact it symmetrizes and broadens. Through density functional theory calcu-lations and the non-equilibrium non-crossing approximation, we show that the lineshape broadening ismainly a consequence of the additional coupling to the tip, while non-equilibrium effects only modifythe large-bias tails of the ZBA. Published by AIP Publishing. [http://dx.doi.org/10.1063/1.4972874]
