2000/04/19 by Jairo Sinova, A. H. MacDonald, S. M. Girvin · 3 citations
Physics and Astronomy · #Anderson impurity model #Condensed matter physics #Electron #Ferromagnetism #Ground state #Paramagnetism #Physics #Physics of Superconductivity and Magnetism #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quasiparticle #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.62.13579
published as Phys. Rev. B 62, 13579 (2000) · 10 pages, 8 figures, submitted to PRB
arxiv created 2000/04/19 · openalex publication_date 2000/11/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report on a finite-size Hartree-Fock study of the competition between disorder and interactions in a two-dimensional electron gas near Landau-level filling factor \ensuremathν=1. The ground state at \ensuremathν=1 evolves with increasing disorder from a fully spin-polarized ferromagnet with a charge gap to a partially spin-polarized ferromagnetic Anderson insulator, to a quasimetallic paramagnet at the critical point between i=0 and i=2 quantum Hall plateaus. Away from \ensuremathν=1, the ground state evolves from a ferromagnetic Skyrmion quasiparticle glass to a conventional quasiparticle glass, and finally to a conventional Anderson insulator. We comment on signatures of these different regimes in low-temperature transport and NMR line shape and peak position data.