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Abstract:

We introduce a quantum Monte Carlo technique to calculate exactly at finite temperatures the Green function of a fermionic quantum impurity coupled to a bosonic field. While the algorithm is general, we focus on the single impurity Anderson model coupled to a Holstein phonon as a schematic model for a molecular transistor. We compute the density of states at the impurity in a large range of parameters, to demonstrate the accuracy and efficiency of the method. We also obtain the conductance of the impurity model and analyze different regimes. The results show that even in the case when the effective attractive phonon interaction is larger than the Coulomb repulsion, a Kondo-like conductance behavior might be observed. © 2005 The American Physical Society.

Registro:

Documento: Artículo
Título:Quantum Monte Carlo method for models of molecular nanodevices
Autor:Arrachea, L.; Rozenberg, M.J.
Filiación:Instituto de Biocomputacion Y Fisica de Sistemas Complejos, Universidad de Zaragoza, Corona de Aragon 42, (50009) Zaragoza, Spain
Laboratoire de Physique des Solides, CNRS-UMR8502, Universite de Paris-Sud, Orsay 91405, France
Departamento de Física, FCEN, Ciudad Universitaria Pab. 1, 1428 Buenos Aires, Argentina
Año:2005
Volumen:72
Número:4
DOI: http://dx.doi.org/10.1103/PhysRevB.72.041301
Título revista:Physical Review B - Condensed Matter and Materials Physics
Título revista abreviado:Phys. Rev. B Condens. Matter Mater. Phys.
ISSN:10980121
CODEN:PRBMD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v72_n4_p_Arrachea

Referencias:

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Citas:

---------- APA ----------
Arrachea, L. & Rozenberg, M.J. (2005) . Quantum Monte Carlo method for models of molecular nanodevices. Physical Review B - Condensed Matter and Materials Physics, 72(4).
http://dx.doi.org/10.1103/PhysRevB.72.041301
---------- CHICAGO ----------
Arrachea, L., Rozenberg, M.J. "Quantum Monte Carlo method for models of molecular nanodevices" . Physical Review B - Condensed Matter and Materials Physics 72, no. 4 (2005).
http://dx.doi.org/10.1103/PhysRevB.72.041301
---------- MLA ----------
Arrachea, L., Rozenberg, M.J. "Quantum Monte Carlo method for models of molecular nanodevices" . Physical Review B - Condensed Matter and Materials Physics, vol. 72, no. 4, 2005.
http://dx.doi.org/10.1103/PhysRevB.72.041301
---------- VANCOUVER ----------
Arrachea, L., Rozenberg, M.J. Quantum Monte Carlo method for models of molecular nanodevices. Phys. Rev. B Condens. Matter Mater. Phys. 2005;72(4).
http://dx.doi.org/10.1103/PhysRevB.72.041301