Physics – Condensed Matter
Scientific paper
1995-08-23
Physics
Condensed Matter
Revtex style, 31 pages (including 4 tables) and 4 uuencoded postscript figures in a separate file (also avalaible from R. Cote
Scientific paper
10.1103/PhysRevB.53.10019
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.
Cote Raphael
MacDonald Allan. H.
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