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Abstract:

In this work we study the behavior of the voltage profile of a 1D quantum wire with an impurity when transport is induced by two ac voltages that oscillating with a phase lag define a quantum pump. The voltage profile sensed along the wire by the voltage probe, that we assume weakly coupled to the system, exhibits a Friedel's oscillations structure inside the region delimited by the position of the two ac voltages that induce transport. On the other hand, outside this region the oscillations are suppressed. Using perturbation theory in the coupling constant of the voltage probe we derived analytical expressions for the DC current valid for the adiabatic regime. We also compare our analytical results with the exact numerical calculations using Keldysh non-equilibrium Green's functions formalism. © 2009 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:DC voltage profile of a 1D pumped wire with two dynamical and one static impurities
Autor:Foieri, F.; Arrachea, L.; José Sánchez, M.
Filiación:Departamento de Física J.J. Giambiagi FCEyN, Universidad de Buenos Aires, Ciudad Universitaria Pab. I, 1428 Buenos Aires, Argentina
Centro Atómico Bariloche, Instituto Balseiro, Bustillo 9500, 8400 Bariloche, Argentina
Palabras clave:Four point resistance; Quantum pumps; Quantum transport; Ac voltage; Analytical expressions; Analytical results; Coupling constants; Dc current; DC voltage; Four point resistance; Non-equilibrium Green's function; Numerical calculation; Perturbation theory; Phase lags; Quantum pumps; Quantum transport; Quantum wires; Voltage probes; Voltage profile; Differential equations; Electric potential; Green's function; Impurities; Perturbation techniques; Probes; Pumps; Quantum electronics; Wire; Quantum chemistry
Año:2009
Volumen:404
Número:18
Página de inicio:2802
Página de fin:2804
DOI: http://dx.doi.org/10.1016/j.physb.2009.06.086
Título revista:Physica B: Condensed Matter
Título revista abreviado:Phys B Condens Matter
ISSN:09214526
CODEN:PHYBE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v404_n18_p2802_Foieri

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Citas:

---------- APA ----------
Foieri, F., Arrachea, L. & José Sánchez, M. (2009) . DC voltage profile of a 1D pumped wire with two dynamical and one static impurities. Physica B: Condensed Matter, 404(18), 2802-2804.
http://dx.doi.org/10.1016/j.physb.2009.06.086
---------- CHICAGO ----------
Foieri, F., Arrachea, L., José Sánchez, M. "DC voltage profile of a 1D pumped wire with two dynamical and one static impurities" . Physica B: Condensed Matter 404, no. 18 (2009) : 2802-2804.
http://dx.doi.org/10.1016/j.physb.2009.06.086
---------- MLA ----------
Foieri, F., Arrachea, L., José Sánchez, M. "DC voltage profile of a 1D pumped wire with two dynamical and one static impurities" . Physica B: Condensed Matter, vol. 404, no. 18, 2009, pp. 2802-2804.
http://dx.doi.org/10.1016/j.physb.2009.06.086
---------- VANCOUVER ----------
Foieri, F., Arrachea, L., José Sánchez, M. DC voltage profile of a 1D pumped wire with two dynamical and one static impurities. Phys B Condens Matter. 2009;404(18):2802-2804.
http://dx.doi.org/10.1016/j.physb.2009.06.086