Tuning of the electron g factor in defect-free GaAs nanodisks

Li-Wei Yang, Yi Chia Tsai, Yiming Li, Higo Aiko, Murayama Akihiro, Seiji Samukawa, Oleksandr Voskoboynikov

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4 Scopus citations

Abstract

We theoretically study the impact of changes in surroundings on the electron ground-state effective g factor in defect-free GaAs/AlGaAs nanodisks. To perform the study, we formulate and deploy a computational efficient full three-dimensional model to describe the effective g-factor tensor in semiconductor nano-objects of complex geometry and material content. This model is based on an effective 2 x 2 conduction-band Hamiltonian which includes the Rashba and Dresselhaus spin-orbit couplings. The description is suited to clarify the important question of the controllability of the electron effective g factor in semiconductor nano-objects. The results of this theoretical study suggest that in the defect-free GaAs/AlGaAs nanodisks, the effective g factor can be tuned within a wide range by proper design of the nanodisk environment. The zz components of the electron effective g-factor tensor obtained in our simulation are in good agreement with some recent experimental observations.
Original languageEnglish
Article number245423
JournalPhysical Review B
Volume92
Issue number24
DOIs
StatePublished - 15 Dec 2015

Keywords

  • QUANTUM; SPINS; SEMICONDUCTORS

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