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Abstract:

We generalize the representation of the real-time Green's functions introduced by Langreth and Nordlander [Phys. Rev. B 43, 2541 (1991)] and Meir and Wingreen [Phys. Rev. Lett. 68, 2512 (1992)] in stationary quantum transport in order to study problems with hybrid structures containing normal (N) and superconducting (S) pieces without introducing Nambu representation. We illustrate the treatment in a S-N junction under a stationary bias. We derive expressions for the normal and Andreev transmission functions, and we show the equivalence between these expressions and Blonder-Tinkham-Klapwijk formulation. Finally, we investigate in detail the behavior of the equilibrium currents in a normal ring threaded by a magnetic flux with attached superconducting wires at equilibrium. We analyze the flux sensitivity of the Andreev states, and we show that their response is equivalent to the one corresponding to the Cooper pairs with momentum q=0 in an isolated superconducting ring. © 2009 The American Physical Society.

Registro:

Documento: Artículo
Título:Stationary transport in mesoscopic hybrid structures with contacts to superconducting and normal wires: A Green's function approach for multiterminal setups
Autor:Arrachea, L.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Departamento de Física de la Materia Condensada, BIFI, Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
Año:2009
Volumen:79
Número:10
DOI: http://dx.doi.org/10.1103/PhysRevB.79.104513
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_v79_n10_p_Arrachea

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Citas:

---------- APA ----------
(2009) . Stationary transport in mesoscopic hybrid structures with contacts to superconducting and normal wires: A Green's function approach for multiterminal setups. Physical Review B - Condensed Matter and Materials Physics, 79(10).
http://dx.doi.org/10.1103/PhysRevB.79.104513
---------- CHICAGO ----------
Arrachea, L. "Stationary transport in mesoscopic hybrid structures with contacts to superconducting and normal wires: A Green's function approach for multiterminal setups" . Physical Review B - Condensed Matter and Materials Physics 79, no. 10 (2009).
http://dx.doi.org/10.1103/PhysRevB.79.104513
---------- MLA ----------
Arrachea, L. "Stationary transport in mesoscopic hybrid structures with contacts to superconducting and normal wires: A Green's function approach for multiterminal setups" . Physical Review B - Condensed Matter and Materials Physics, vol. 79, no. 10, 2009.
http://dx.doi.org/10.1103/PhysRevB.79.104513
---------- VANCOUVER ----------
Arrachea, L. Stationary transport in mesoscopic hybrid structures with contacts to superconducting and normal wires: A Green's function approach for multiterminal setups. Phys. Rev. B Condens. Matter Mater. Phys. 2009;79(10).
http://dx.doi.org/10.1103/PhysRevB.79.104513