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arXiv · 1303.0158

Electrically tunable three-dimensional g-factor anisotropy in single InAs self-assembled quantum dots

S. Takahashi·R. S. Deacon·A. Oiwa·K. Shibata·K. Hirakawa·S. Tarucha
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Abstract

Three-dimensional anisotropy of the Lande g-factor and its electrical modulation are studied for single uncapped InAs self-assembled quantum dots (QDs). The g-factor is evaluated from measurement of inelastic cotunneling via Zeeman substates in the QD for various magnetic field directions. We find that the value and anisotropy of the g-factor depends on the type of orbital state which arises from the three-dimensional confinement anisotropy of the QD potential. Furthermore, the g-factor and its anisotropy are electrically tuned by a side-gate which modulates the confining potential.

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S. Takahashi, R. S. Deacon, A. Oiwa, K. Shibata, K. Hirakawa, S. Tarucha. 2013-03-01. Electrically tunable three-dimensional g-factor anisotropy in single InAs self-assembled quantum dots. https://doi.org/10.1103/physrevb.87.161302

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