Electron cotunneling through doubly occupied quantum dots: effect of spin configuration
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چکیده
منابع مشابه
Electron cotunneling through doubly occupied quantum dots: effect of spin configuration
A microscopic theory is presented for electron cotunneling through doubly occupied quantum dots in the Coulomb blockade regime. Beyond the semiclassic framework of phenomenological models, a fully quantum mechanical solution for cotunneling of electrons through a one-dimensional quantum dot is obtained using a quantum transmitting boundary method without any fitting parameters. It is revealed t...
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The spin-polarized transport through two-level quantum dots weakly coupled to ferromagnetic leads is considered theoretically in the Coulomb blockade regime. It is assumed that the dot is doubly occupied, so that the current flows due to cotunneling through singlet and triplet states of the dot. It is shown that, by sweeping the bias voltage, one can induce a singlet–triplet transition, which d...
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Few-electron quantum dots are investigated in the regime of strong tunneling to the leads. Inelastic cotunneling is used to measure the two-electron singlet-triplet splitting above and below a magnetic field driven singlet-triplet transition. Evidence for a nonequilibrium two-electron singlet-triplet Kondo effect is presented. Cotunneling allows orbital correlations and parameters characterizin...
متن کاملSupplemental information: Cotunneling drag effect in Coulomb-coupled quantum dots
A. J. Keller, ∗ J. S. Lim, David Sánchez, Rosa López, S. Amasha, † J. A. Katine, Hadas Shtrikman, and D. Goldhaber-Gordon ‡ Department of Physics, Stanford University, Stanford, California 94305, USA School of Physics, Korea Institute for Advanced Study, Seoul 130-722, Korea IFISC (UIB-CSIC), E-07122 Palma de Mallorca, Spain HGST, San Jose, CA 95135, USA Department of Condensed Matter Physics, ...
متن کاملCotunneling Drag Effect in Coulomb-Coupled Quantum Dots.
In Coulomb drag, a current flowing in one conductor can induce a voltage across an adjacent conductor via the Coulomb interaction. The mechanisms yielding drag effects are not always understood, even though drag effects are sufficiently general to be seen in many low-dimensional systems. In this Letter, we observe Coulomb drag in a Coulomb-coupled double quantum dot and, through both experiment...
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ژورنال
عنوان ژورنال: Nanoscale Research Letters
سال: 2011
ISSN: 1556-276X
DOI: 10.1186/1556-276x-6-251