2000 character limit reached
Strong Hyperfine-Induced Modulation of an Optically-Driven Hole Spin in an InAs Quantum Dot (1307.3260v2)
Published 11 Jul 2013 in cond-mat.mes-hall and quant-ph
Abstract: Compared to electrons, holes in InAs quantum dots have a significantly weaker hyperfine interaction that leads to less dephasing from nuclear spins. Thus many recent studies have suggested that nuclear spins are unimportant for hole spin dynamics compared to electric field fluctuations. We show that the hole hyperfine interaction can have a strong effect on hole spin coherence measurements through a nuclear feedback effect. The nuclear polarization is generated through a unique process that is dependent on the anisotropy of the hole hyperfine interaction and the coherent precession of nuclear spins, giving rise to strong modulation at the nuclear precession frequency.