Single Charge Current in a Normal Mesoscopic Region Attached to Superconductor Leads via a Coupled Poisson Nonequilibrium Green Function Formalism
We study the I-V characteristic of mesoscopic systems or quantum dot (QD) attached to a pair of superconducting leads. Interaction effects in the QD are considered through the charging energy of the QD; that is, the treatment of current transport under a voltage bias is performed within a coupled Po...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/721671 |
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| author | David Verrilli F. P. Marin Rafael Rangel |
| author_facet | David Verrilli F. P. Marin Rafael Rangel |
| author_sort | David Verrilli |
| collection | DOAJ |
| description | We study the I-V characteristic of mesoscopic systems or quantum dot (QD) attached to a pair of superconducting leads. Interaction effects in the QD are considered through the charging energy of the QD; that is, the treatment of current transport under a voltage bias is performed within a coupled Poisson nonequilibrium Green function (PNEGF) formalism. We derive the expression for the current in full generality but consider only the regime where transport occurs only via a single particle current. We show for this case and for various charging energies values U0 and associated capacitances of the QD the effect on the I-V characteristic. Also the influence of the coupling constants on the I-V characteristic is investigated. Our approach puts forward a novel interpretation of experiments in the strong Coulomb regime. |
| format | Article |
| id | doaj-art-951917cdb7e647fb8338469dddb827a8 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-951917cdb7e647fb8338469dddb827a82025-02-03T01:00:25ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/721671721671Single Charge Current in a Normal Mesoscopic Region Attached to Superconductor Leads via a Coupled Poisson Nonequilibrium Green Function FormalismDavid Verrilli0F. P. Marin1Rafael Rangel2Laboratorio de Física Teórica de Sólidos (LFTS), Centro de Física Teórica y Computacional (CEFITEC), Facultad de Ciencias, Universidad Central de Venezuela, A.P. 47586, Caracas 1041-A, VenezuelaLaboratorio de Física Teórica de Sólidos (LFTS), Centro de Física Teórica y Computacional (CEFITEC), Facultad de Ciencias, Universidad Central de Venezuela, A.P. 47586, Caracas 1041-A, VenezuelaDepartamento de Física, Universidad Simón Bolívar, A.P. 89000, Caracas 1080-A, VenezuelaWe study the I-V characteristic of mesoscopic systems or quantum dot (QD) attached to a pair of superconducting leads. Interaction effects in the QD are considered through the charging energy of the QD; that is, the treatment of current transport under a voltage bias is performed within a coupled Poisson nonequilibrium Green function (PNEGF) formalism. We derive the expression for the current in full generality but consider only the regime where transport occurs only via a single particle current. We show for this case and for various charging energies values U0 and associated capacitances of the QD the effect on the I-V characteristic. Also the influence of the coupling constants on the I-V characteristic is investigated. Our approach puts forward a novel interpretation of experiments in the strong Coulomb regime.http://dx.doi.org/10.1155/2014/721671 |
| spellingShingle | David Verrilli F. P. Marin Rafael Rangel Single Charge Current in a Normal Mesoscopic Region Attached to Superconductor Leads via a Coupled Poisson Nonequilibrium Green Function Formalism The Scientific World Journal |
| title | Single Charge Current in a Normal Mesoscopic Region Attached to Superconductor Leads via a Coupled Poisson Nonequilibrium Green Function Formalism |
| title_full | Single Charge Current in a Normal Mesoscopic Region Attached to Superconductor Leads via a Coupled Poisson Nonequilibrium Green Function Formalism |
| title_fullStr | Single Charge Current in a Normal Mesoscopic Region Attached to Superconductor Leads via a Coupled Poisson Nonequilibrium Green Function Formalism |
| title_full_unstemmed | Single Charge Current in a Normal Mesoscopic Region Attached to Superconductor Leads via a Coupled Poisson Nonequilibrium Green Function Formalism |
| title_short | Single Charge Current in a Normal Mesoscopic Region Attached to Superconductor Leads via a Coupled Poisson Nonequilibrium Green Function Formalism |
| title_sort | single charge current in a normal mesoscopic region attached to superconductor leads via a coupled poisson nonequilibrium green function formalism |
| url | http://dx.doi.org/10.1155/2014/721671 |
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