Spin and negative differential conductance in the transport through a quantum dot in a magnetic field
| Autor: | M.C. Rogge, Bernhard Kramer, Rolf J. Haug, Maura Sassetti, Fabio Cavaliere |
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| Rok vydání: | 2006 |
| Předmět: |
Physics
Condensed matter physics BLOCKADE media_common.quotation_subject Coulomb blockade Conductance NONLINEAR TRANSPORT Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Asymmetry Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Magnetic field Tunnel effect Quantum dot Ground state media_common Spin-½ |
| Zdroj: | 32 (2006): 442–445. info:cnr-pdr/source/autori:Rogge, MC; Cavaliere, F; Sassetti, M; Haug, RJ; Kramer, B/titolo:Spin and negative differential conductance in the transport through a quantum dot in a magnetic field/doi:/rivista:/anno:2006/pagina_da:442/pagina_a:445/intervallo_pagine:442–445/volume:32 |
| ISSN: | 1386-9477 |
| Popis: | Results of combined experimental and theoretical studies of transport spectra of a quantum dot in a magnetic field are reported. In the linear regime, the observed oscillatory behavior of the conductance peaks with varying magnetic field is interpreted in terms of successive rearrangements in the electronic ground state configurations of Fock-Darwin energy levels. Spin-blockade related bimodal behavior is also observed in the peak intensities due to spin dependent tunneling. In the nonlinear regime, a regular pattern of negative differential conductance is detected. This is compared with different theoretical cases demonstrating a subtle interplay between spin dependent tunneling and source and drain resistance asymmetries. (c) 2006 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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