Far-infrared absorption of self-assembled semiconductor rings
Josep Planelles, Juan I. Climente
TL;DR
This paper provides a comprehensive theoretical analysis of far-infrared spectroscopy on self-assembled quantum rings, accurately matching experimental resonances by incorporating realistic physical effects and size distributions.
Contribution
It introduces a detailed 3D effective-mass model that includes strain, Coulomb interactions, and a bimodal size distribution to explain experimental spectra.
Findings
Successfully reproduces all experimental resonances
Highlights importance of strain and Coulomb effects
Shows impact of size distribution on spectra
Abstract
We report a theoretical description of far-infrared spectroscopy experiments on self-assembled quantum rings in a magnetic field [A. Lorke et al., Phys. Rev. Lett. 84, 2223 (2000)] which, for the first time, accounts for the full set of experimental resonances. In our calculations we use a 3D effective-mass model with a realistic finite step-like confinement potential, including strain and Coulomb effects. We assume a bimodal distribution of ring sizes.
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Taxonomy
TopicsSemiconductor Quantum Structures and Devices · Quantum and electron transport phenomena · Molecular Junctions and Nanostructures