Charge Density Wave Ordering in Half Filled High Landau Levels

Abstract

We report on numerical studies of two-dimensional electron systems in the presence of a perpendicular magnetic field, with a high Landau level index (N > 1) half filled by electrons. Strong and sharp peaks are found in the wave vector dependence of both static density susceptibility and equal-time density-density correlation function, in finite-size systems with up to twelve electrons. Qualitatively different from partially filled lowest (N=0) Landau level, these results are suggestive of a tendency toward charge density wave ordering in these systems. The ordering wave vector is found to decrease with increasing N.

Final version, overlaps with HF corrected and some minor changes

References in corpus (2)

• Strongly Anisotropic Transport in Higher Two-Dimensional Landau Levels
• Liquid Crystal Phases of Quantum Hall Systems

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