2004/10/26 by Craig Pryor, Craig E. Pryor, Pryor, Craig E. +2 · 4 citations
Materials Science · Physics and Astronomy · #Angular momentum #Angular momentum coupling #Asymmetry #Condensed matter physics #Electron #Landé g-factor #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum dot laser #Quantum mechanics #Semiconductor #Semiconductor Quantum Structures and Devices #Total angular momentum quantum number #ZnO doping and properties #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0410678
published in arXiv (Cornell University) (Cornell University) · 5 pages, 5 figs
arxiv created 2004/10/26 · openalex publication_date 2004/10/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that the electron and hole Lande g factors in self-assembled III-V quantum dots have a rich structure intermediate between that expected for paramagnetic atomic impurities and for bulk semiconductors. Strain, dot geometry, and confinement energy significantly modify the effective g factors of the semiconductor material from which the dot and barrier are constructed, yet these effects are insufficient to explain our results. We find that the quantization of the quantum dot electronic states further quenches the orbital angular momentum of the dot states, pushing the electron g factor towards 2, even when all the semiconductor constituents of the dot have negative g factors. This leads to trends in the dot's electron g factors that are the opposite of those expected from the effective g factors of the dot and barrier material. Both electron and hole g factors are strongly dependent on the magnetic field orientation; hole g factors for InAs/GaAs quatum dots have large positive values along the growth direction and small negative values in-plane. The approximate shape of a quantum dot can be determined from measurements of this g factor asymmetry.