Broken rotation symmetry in the fractional quantum Hall system

Details Broken rotation symmetry in the fractional quantum Hall system Broken rotation symmetry in the fractional quantum Hall system

1995-05-22

arxiv.org/abs/cond-mat/9505099v1

Physics

Condensed Matter

8 pages, LaTex 3.1, figures attached

Scientific paper

10.1088/0953-8984/8/8/002

We demonstrate that the two-dimensonal electron system in a strong perpendicular magnetic field has stable states which break rotational but not translational symmetry. The Laughlin fluid becomes unstable to these states in quantum wells whose thickness exceeds a critical value which depends on the electron density. The order parameter at 1/3 reduced density resembles that of a nematic liquid crystal, in that a residual two-fold rotation axis is present in the low symmetry phase. At filling factors 1/5 and 1/7, there are states with four- and six-fold axes, as well. We discuss the experimental detection of these phases.

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