Long-lived spin polarisation in the charged InP quantum dots

This work is aimed at the investigation of the spin relaxation in controllably charged quantum dots (QDs). Measuring the dependence of the spin lifetime on the gate voltage in a heterostructure containing InP QDs, we detected the onset of spin conservation when the QD became negatively charged. The spin lifetime in the charged QDs exceeded View the MathML source. Various properties of the long-lived spin polarisation of the QDs in longitudinal magnetic field as well as under various excitation conditions are discussed.