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

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.

5 pages, 5 figures

References in corpus (3)

• Kondo Universal Scaling for a Quantum Dot Coupled to Superconducting Leads
• Lande g-tensor in semiconductor nanostructures
• Interplay of Coulomb interaction and spin-orbit effects in multi-level quantum dots

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