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- W2057360420 abstract "We present a quantitative theoretical analysis of electron, hole, and exciton $g$ tensors of vertically coupled InAs/GaAs quantum dot pairs in external electric and magnetic fields. For magnetic fields lying in the growth plane, we predict a giant electrically tunable anisotropy of hole $g$ factors that is introduced by piezoelectric charges. This effect allows bias controlled $g$ factor switching and single-spin manipulations in a static magnetic field. We use a relativistic eight-band $mathbf{k}ensuremath{cdot}mathbf{p}$ envelope function method including strain, which accounts for magnetic fields in a gauge-invariant manner. In a regime where the molecular wave functions form bonding and antibonding orbitals and for vertical magnetic fields, our results reproduce experimentally observed resonant enhancements of exciton $g$ factors without any fitting parameters." @default.
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- W2057360420 date "2009-01-15" @default.
- W2057360420 modified "2023-10-15" @default.
- W2057360420 title "Electrically controllable<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>g</mml:mi></mml:math>tensors in quantum dot molecules" @default.
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- W2057360420 doi "https://doi.org/10.1103/physrevb.79.045307" @default.
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