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Abstract:

We study an impurity Anderson model to describe an iron phthalocyanine (FePc) molecule on Au(1 1 1), motivated by previous results of scanning tunneling spectroscopy (STS) and theoretical studies. The model hybridizes a spin doublet consisting in one hole at the 3dz2 orbital of iron and two degenerate doublets corresponding to one hole either in the 3dxz or in the 3dyz orbital (called π orbitals) with two degenerate Hund-rule triplets with one hole in the 3dz orbital and another one in a π orbital. We solve the model using a slave-boson mean-field approximation (SBMFA). For reasonable parameters we can describe very well the observed STS spectrum between sample bias -60 mV to 20 mV. For these parameters the Kondo effect takes place in two stages, with different energy scales TzK > T K corresponding to the Kondo temperatures related with the hopping of the z2 and π orbitals respectively. There is a strong interference between the different channels and the Kondo temperatures, particularly the lowest one is strongly reduced compared with the value in the absence of the competing channel. © 2018 Institute of Physics Publishing. All rights reserved.

Registro:

Documento: Artículo
Título:Two-stage three-channel Kondo physics for an FePc molecule on the Au(1 1 1) surface
Autor:Fernández, J.; Roura-Bas, P.; Camjayi, A.; Aligia, A.A.
Filiación:Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energia Atómica, CONICET Bariloche, 8400, Argentina
Departamento de Fisica, FCEyN, Universidad de Buenos Aires, IFIBA, Pabellón i, Ciudad Universitaria, CABA, 1428, Argentina
Palabras clave:Iron; Molecules; Scanning tunneling microscopy; Anderson models; Iron phthalocyanines; Kondo temperatures; Mean field approximation; Scanning tunneling spectroscopy; Strong interference; Theoretical study; Three channel; Orbits
Año:2018
Volumen:30
Número:37
DOI: http://dx.doi.org/10.1088/1361-648X/aad973
Título revista:Journal of Physics Condensed Matter
Título revista abreviado:J Phys Condens Matter
ISSN:09538984
CODEN:JCOME
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09538984_v30_n37_p_Fernandez

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Citas:

---------- APA ----------
Fernández, J., Roura-Bas, P., Camjayi, A. & Aligia, A.A. (2018) . Two-stage three-channel Kondo physics for an FePc molecule on the Au(1 1 1) surface. Journal of Physics Condensed Matter, 30(37).
http://dx.doi.org/10.1088/1361-648X/aad973
---------- CHICAGO ----------
Fernández, J., Roura-Bas, P., Camjayi, A., Aligia, A.A. "Two-stage three-channel Kondo physics for an FePc molecule on the Au(1 1 1) surface" . Journal of Physics Condensed Matter 30, no. 37 (2018).
http://dx.doi.org/10.1088/1361-648X/aad973
---------- MLA ----------
Fernández, J., Roura-Bas, P., Camjayi, A., Aligia, A.A. "Two-stage three-channel Kondo physics for an FePc molecule on the Au(1 1 1) surface" . Journal of Physics Condensed Matter, vol. 30, no. 37, 2018.
http://dx.doi.org/10.1088/1361-648X/aad973
---------- VANCOUVER ----------
Fernández, J., Roura-Bas, P., Camjayi, A., Aligia, A.A. Two-stage three-channel Kondo physics for an FePc molecule on the Au(1 1 1) surface. J Phys Condens Matter. 2018;30(37).
http://dx.doi.org/10.1088/1361-648X/aad973