Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 9, Pages 1982-1985Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.1982
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The two-dimensional electron gas (ZDEG) in moderate magnetic fields in ultraclean AlAa-GaAs heterojunctions exhibits transport anomalies suggestive of a compressible anisotropic metallic start. Using scaling arguments and Monte Carlo simulations, we develop an order parameter theory of an electron nematic phase. The observed temperature dependence of the resistivity anisotropy behaves like the orientational order parameter if the transition to the nematic state occurs at a finite temperature T-c similar to 65 mK, and is slightly rounded by a small background microscopic anisotropy. We propose a light scattering experiment to measure the critical susceptibility.
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