EnglishWe estimate the triplet-singlet relaxation time due to spin-orbit coupling assisted by phonon emission in weakly confined quantum dots. Calculations are performed taking into account Coulomb and spin-orbit interactions exactly within the full configuration interaction method, and Fermi golden rule. Our results for two and four electrons show that different triplet-singlet relaxation trends observed in recent experiments under magnetic fields can be understood within a unified theoretical description, as the result of the competition between spin-orbit coupling and phonon emission efficiency. Moreover, we show that properly designed QD structures may give access to very long-lived triplet states as well as to selective population of the triplet Zeeman sublevels.
| Data di pubblicazione: | 2007 |
| Titolo: | Magnetic field dependence of triplet-singlet relaxation in quantum dots with spin-orbit coupling |
| Autore/i: | Climente, Ji; Bertoni, A; Goldoni, Guido; Rontani, M; Molinari, Elisa |
| Autore/i UNIMORE: | |
| Rivista: | |
| Volume: | 75 |
| Pagina iniziale: | 1 |
| Pagina finale: | 4 |
| Codice identificativo ISI: | WOS:000244533800005 |
| Codice identificativo Scopus: | 2-s2.0-33846952805 |
| Citazione: | Magnetic field dependence of triplet-singlet relaxation in quantum dots with spin-orbit coupling / Climente, Ji; Bertoni, A; Goldoni, Guido; Rontani, M; Molinari, Elisa. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 75(2007), pp. 1-4. |
| Tipologia | Articolo su rivista |
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| PhysRevB_75_081303_07.pdf | Versione editoriale | Open Access Visualizza/Apri |
http://hdl.handle.net/11380/23165
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