Strong hyperfine-induced modulation of an optically driven hole spin in an InAs quantum dot

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...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2014-02, Vol.89 (7), Article 075316
Main Authors: Carter, S. G., Economou, Sophia E., Greilich, A., Barnes, Edwin, Sweeney, T., Bracker, A. S., Gammon, D.
Format: Article
Language:English
Subjects:
Coherence
Condensed matter
Dynamic tests
Fluctuation
Indium arsenides
Modulation
Nuclear spin
Precession
Qunatum dots
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Summary: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.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.89.075316