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Abstract:

The conductance of a double-dot system in a ring threaded by a magnetic flux is studied. The ring is connected to two leads in such a way that each dot is embedded in one arm of the structure. The currents going through each arm of the ring are determined by the Aharonov-Bohm effect and the dot charging effects. The conductance for different values of the magnetic flux is obtained as a function of the gate potentials applied to the dots, for two situations: when the dot level energies are equal, ΔE = 0, and when they are different but with ΔE smaller than the Coulomb interaction U. The conductance shows quite distinct behavior according to having a finite or zero magnetic flux threading the ring. The system presents S = 1/2 and S = l Kondo phenomena for no magnetic flux and is in the S = 1/2 Kondo regime in the case of half a quantum of magnetic flux.

Registro:

Documento: Artículo
Título:Conductance through two quantum dots in a ring: Magnetic flux dependence
Autor:Apel, V.M.; Davidovich, M.A.; Chiappe, G.; Anda, E.V.
Filiación:Departamento de Física, Pontificia Universidade Católica do Rio de Janeiro, C.P. 38071-970, Rio de Janeiro, RJ, Brazil
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428, Buenos Aires, Argentina
Palabras clave:Conductance; Double-dot system; Magnetic flux
Año:2006
Volumen:36
Número:2 A
Página de inicio:408
Página de fin:411
DOI: http://dx.doi.org/10.1590/S0103-97332006000300047
Título revista:Brazilian Journal of Physics
Título revista abreviado:Braz. J. Phys.
ISSN:01039733
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_01039733_v36_n2A_p408_Apel.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01039733_v36_n2A_p408_Apel

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Citas:

---------- APA ----------
Apel, V.M., Davidovich, M.A., Chiappe, G. & Anda, E.V. (2006) . Conductance through two quantum dots in a ring: Magnetic flux dependence. Brazilian Journal of Physics, 36(2 A), 408-411.
http://dx.doi.org/10.1590/S0103-97332006000300047
---------- CHICAGO ----------
Apel, V.M., Davidovich, M.A., Chiappe, G., Anda, E.V. "Conductance through two quantum dots in a ring: Magnetic flux dependence" . Brazilian Journal of Physics 36, no. 2 A (2006) : 408-411.
http://dx.doi.org/10.1590/S0103-97332006000300047
---------- MLA ----------
Apel, V.M., Davidovich, M.A., Chiappe, G., Anda, E.V. "Conductance through two quantum dots in a ring: Magnetic flux dependence" . Brazilian Journal of Physics, vol. 36, no. 2 A, 2006, pp. 408-411.
http://dx.doi.org/10.1590/S0103-97332006000300047
---------- VANCOUVER ----------
Apel, V.M., Davidovich, M.A., Chiappe, G., Anda, E.V. Conductance through two quantum dots in a ring: Magnetic flux dependence. Braz. J. Phys. 2006;36(2 A):408-411.
http://dx.doi.org/10.1590/S0103-97332006000300047