Spin manipulation and spin-lattice interaction in magnetic colloidal quantum dots
- Moro, Fabrizio
- Turyanska, Lyudmila
- Granwehr, Josef
- Patanè, Amalia
DOIAbstract
We report on the spin-lattice interaction and coherent manipulation of electron spins in Mn-doped colloidal PbSquantum dots (QDs) by electron spin resonance.We show that the phase memory time, TM, is limited by Mn–Mndipolar interactions, hyperfine interactions of the protons (1H) on the QD capping ligands with Mn ions in theirproximity (<1 nm), and surface phonons originating from thermal fluctuations of the capping ligands. In the lowMn concentration limit and at low temperature, we achieve a long phase memory time constant TM ∼ 0.9μs,thus enabling the observation of Rabi oscillations. Our findings suggest routes to the rational design of magneticcolloidal QDs with phase memory times exceeding the current limits of relevance for the implem...
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