Unconventional mechanisms of resonance tunneling through complex quantum dots
✍ Scribed by K. Kikoin; T. Kuzmenko; Y. Avishai
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 106 KB
- Volume
- 17
- Category
- Article
- ISSN
- 1386-9477
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✦ Synopsis
It is shown that the resonance tunneling through a complex quantum dot with even occupation reveals the hidden dynamical SO(n) symmetry of this dot. This symmetry is manifested in unconventional mechanisms of Kondo resonance formation, where the gate voltage may tune the rank n gradually. In a speciÿc case of triple quantum dot, the regimes with n = 3; 4; 5; 7 can be achieved.
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Jaskblski and M Bylicki, lnstytut Fizyki
## Abstract Resonant electronic transport through two coupled non‐interacting single‐level quantum dots attached to ferromagnetic leads with collinear magnetizations is analyzed theoretically. Coupling of the dots to external leads as well as the inter‐dot coupling are assumed to be spin dependent.
We discuss resonant tunneling through quantum dot energy levels considering the charging energy of the dot. The hamiltonian of the system is reduced to a form of the Anderson hamiltonian of resonant tunneling. The mean-field approximation is applied and currentvoltage characteristics are evaluated.