1995/08/23 by R. Côté, R. Cote, A. H. MacDonald · 1 citation
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat
paper · pdf · doi:10.1103/physrevb.53.10019
Revtex style, 31 pages (including 4 tables) and 4 uuencoded postscript figures in a separate file (also avalaible from R. Cote at [email protected])
arxiv created 1995/08/23 · openalex publication_date 1996/04/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the spin-ordering and the magnon collective modes of the two-dimensional Wigner crystal state at strong magnetic fields. Our work is based on the Hartree-Fock approximation for the ground state and the time-dependent Hartree-Fock approximation for the collective modes. We find that the ground state is ferromagnetic, i.e., that all spins are aligned at T=0 even when the electronic g factor is negligibly small. The magnon calculations show that the spin stiffness is much smaller in the crystal state than in fluid states which occur at nearby Landau-level filling factors. \textcopyright 1996 The American Physical Society.