2005/06/30 by Vadym Apalkov, V. M. Apalkov, Tapash Chakraborty +2 · 2 citations
Physics and Astronomy · #Charge density #Condensed matter physics #Coulomb #Electron #Physics #Physics of Superconductivity and Magnetism #Quantum Hall effect #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum spin Hall effect #Quantum spin liquid #Semiconductor Quantum Structures and Devices #Spectroscopy #Spin polarization #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.73.073310
published in Physical Review B 73(7) (American Physical Society) · 4 pages, 3 figures
arxiv created 2005/06/30 · openalex publication_date 2006/02/21 · arxiv updated 2015/06/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report on our investigation of the low-lying energy spectra and charge density of a two-dimensional quantum Hall liquid at \ensuremathν=2∕5 that is Coulomb-coupled to a quantum dot. The dot contains a hole and two/three electrons. We found that any external perturbation (caused by the close proximity of the quantum dot) locally changes the spin polarization of the incompressible liquid. The effect depends crucially on the separation distance of the quantum dot from the electron plane. Electron density distribution in the quantum Hall layer indicates creation of a quasihole that is localized by the close proximity of the quantum dot. Manifestation of this effect in the photoluminescence spectroscopy is also discussed.