Spin-ordering and magnon collective modes for two-dimensional electron lattices in strong magnetic fields
Condensed Matter
2009-10-28 v1
Abstract
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.
Keywords
Cite
@article{arxiv.cond-mat/9508100,
title = {Spin-ordering and magnon collective modes for two-dimensional electron lattices in strong magnetic fields},
author = {R. Cote and A. H. MacDonald},
journal= {arXiv preprint arXiv:cond-mat/9508100},
year = {2009}
}
Comments
Revtex style, 31 pages (including 4 tables) and 4 uuencoded postscript figures in a separate file (also avalaible from R. Cote at [email protected])