Journal
PHYSICAL REVIEW B
Volume 85, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.125312
Keywords
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Funding
- Ministry of Education and Science RF
- RFBR [11-02-00960a, 11-02-97039/Regional]
- MCINN of Spain [FIS2009-12773-C02-01]
- Grupos Consolidados UPV/EHU del Gobierno Vasco [IT-472-10]
- UPV/EHU [UFI 11/55]
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We consider joint effects of tunneling and spin-orbit coupling on driven by electric field spin dynamics in a double quantum dot with a multilevel resonance scenario. We demonstrate that tunneling plays the crucial role in the formation of the Rabi-like spin-flip transitions. In contrast to the linear behavior for weak electric fields, the spin-flip rate becomes much smaller than expected for the two-level model and shows oscillating dependence on the driving field amplitude in stronger fields. In addition, the full spin flip is very difficult to achieve in a multilevel resonant system. These two effects have a similarity with the Zeno effect of slowing down the dynamics of an observable by its measurement. As a result, spin manipulation by electric field becomes much less efficient than expected.
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