Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
Charge Density Wave State of Two-Dimensional Electrons in Strong Magnetic Fields
Daijiro YoshiokaHidetoshi Fukuyama
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1979 Volume 47 Issue 2 Pages 394-402

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Abstract
Charge density wave (CDW) states of a two-dimensional electron system occupying only the lowest Landau subband are investigated at T=0 by the Hartree-Fock approximation. It is shown that even in the high density region the CDW state has the same periodicity as that of a Wigner lattice but has considerable overlaps of wave functions of nearby electrons. Hence the Wigner lattice at low density changes smoothly to the CDW state at higher density. This coincidence of the periodicity of the CDW with that of the Wigner lattice results from the appearance of a large gap at the Fermi level in the energy spectrum.
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