CDW Ground States and Electron-Hole Symmetry of a Two-Dimensional Electron System in Strong Magnetic Fields

Yoshio Kuramoto

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The ground state of a two-dimensional electron system in a strong magnetic field is studied in the Hartree-Fock approximation for the case of a half-filled ground Landau level. Due consideration is given to consequences of the elec-tron-hole symmetry, which is found to lead to a nonmetallic CDW ground state. The Hartree-Fock integral equations are solved numerically with full account of higher harmonics. The result shows that the ground state is not a triangular CDW, in spite of the most favorable Madelung energy, but a square CDW with the electron-hole symmetry spontaneously broken. Detailed results for band structures, density patterns and cohesive energies are presented.

Original languageEnglish
Pages (from-to)3810-3819
Number of pages10
Journaljournal of the physical society of japan
Volume51
Issue number12
DOIs
Publication statusPublished - 1982

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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