Artículo
Non-fermi-liquid behavior in transport through co-doped Au Chains
Di Napoli, Solange Mariel
; Weichselbaum, A.; Roura Bas, Pablo Gines
; Aligia, Armando Ángel
; Mokrousov, Y.; Blügel, S.
Fecha de publicación:
05/2013
Editorial:
American Physical Society
Revista:
Physical Review Letters
ISSN:
0031-9007
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We calculate the conductance as a function of temperature G ( T ) through Au monatomic chains containing one Co atom as a magnetic impurity, and connected to two conducting leads with a fourfold symmetry axis. Using the information derived from ab initio calculations, we construct an effective model ˆ H eff that hybridizes a 3 d 7 quadruplet at the Co site with two 3 d 8 triplets through the hopping of 5 d x z and 5 d y z electrons of Au. The quadruplet is split by spin anisotropy due to spin-orbit coupling. Solving ˆ H eff with the numerical renormalization group we find that at low temperatures G ( T ) = a − b √ T and the ground state impurity entropy is ln ( 2 ) / 2 , a behavior similar to the two-channel Kondo model. Stretching the chain leads to a non-Kondo phase, with the physics of the underscreened Kondo model at the quantum critical point.
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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(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Di Napoli, Solange Mariel; Weichselbaum, A.; Roura Bas, Pablo Gines; Aligia, Armando Ángel; Mokrousov, Y.; et al.; Non-fermi-liquid behavior in transport through co-doped Au Chains; American Physical Society; Physical Review Letters; 110; 19; 5-2013; 1964021-1964025
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