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Document Type: Artigo
Title: Universal Fano factor and anomalous I-V characteristics in weakly interacting quantum dots
Authors: Souza, André Maurício Conceição de
Macedo, Antônio Murilo Santos
Issue Date: Oct-2005
Abstract: We study interaction effects in quantum dots coupled to perfectly conducting leads via barriers of arbitrary transparencies and embedded in an electromagnetic environment characterized by a fixed external impedance. Combining a recently proposed renormalization group equation for the semiclassical regime of this system with an extended version of circuit theory, we study the Fano factor and the I-V characteristics in the low-temperature and low-energy regime. The Fano factor exhibits a sequence of universal plateaus as a function of the transparencies of the barriers. We also show that a recently discovered quantum transition, at intermediate values of the barrier’s transparencies, leads to an anomalous transport regime characterized by a Fano factor that is the harmonic average of its values in adjacent plateaus. Our result extends a previous classification scheme for mesoscopic conductors.
Keywords: Transporte eletrônico em sistemas mesoscópicos
Pontos quânticos
ISSN: 1550-235X
Publisher / Institution : American Physical Society
Citation: SOUZA, A. M. C.; MACÊDO, A. M. S. Universal Fano factor and anomalous I-V characteristics in weakly interacting quantum dots. Physical Review B, New York, v. 72, n. 16, out. 2005. Disponível em: <>. Acesso em: 18 mar. 2013.
License: Copyrights American Physical Society
Appears in Collections:DFI - Artigos de periódicos

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