Artículo
Kondo behavior and conductance through 3d impurities in gold chains doped with oxygen
Barral, María Andrea
; Di Napoli, Solange Mariel
; Blesio, Germán Gabriel
; Roura Bas, Pablo Gines
; Camjayi, Alberto
; Manuel, Luis Oscar
; Aligia, Armando Ángel
Fecha de publicación:
01/2017
Editorial:
American Institute of Physics
Revista:
Journal of Chemical Physics
ISSN:
0021-9606
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Combining ab initio calculations and effective models derived from them, we discuss the electronic structure of oxygen doped gold chains when one Au atom is replaced by any transition-metal atom of the 3d series. The effect of O doping is to bring extended Au 5dxz and 5dyz states to the Fermi level, which together with the Au states of zero angular momentum projection leads to three possible channels for the screening of the magnetism of the impurity. For most 3d impurities the expected physics is similar to that of the underscreened Kondo model, with singular Fermi liquid behavior. For Fe and Co under a tetragonal crystal field introduced by leads, the system might display a non-Fermi liquid behavior. Ni and Cu impurities are described by a S = 1 two channel Kondo model and an SU(4) impurity Anderson model in the intermediate valence regime, respectively. In both cases, the system is a Fermi liquid, but the conductance shows some observable differences with the ordinary SU(2) Anderson model.
Palabras clave:
Atomic Chains
,
Electronic Transport
,
Kondo Physics
,
Ab Initio Calculations
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Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos(IFIR)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Barral, María Andrea; Di Napoli, Solange Mariel; Blesio, Germán Gabriel; Roura Bas, Pablo Gines; Camjayi, Alberto; et al.; Kondo behavior and conductance through 3d impurities in gold chains doped with oxygen; American Institute of Physics; Journal of Chemical Physics; 146; 9; 1-2017; 1-9; 092315
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