Fluctuations and topological transitions of quantum Hall stripes: nematics as anisotropic hexatics

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We study fluctuations and topological melting transitions of quantum Hall stripes near half-filling of intermediate Landau levels. Taking the stripe state to be an anisotropic Wigner crystal (AWC) allows us to identify the quantum Hall nematic state conjectured in previous studies of the 2D electron gas as an {\em anisotropic hexatic}. The transition temperature from the AWC to the quantum Hall nematic state is explicitly calculated, and a tentative phase diagram for the 2D electron gas near half-filling is suggested.
5 pages, 4 figures; version published in the Rapid Communications section of Phys. Rev. B

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Mesoscale and Nanoscale Physics, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/143442

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0611638
 http://arxiv.org/abs/cond-mat/0611638
 Phys. Rev. B 76, 161306(R) (2007)
 doi:10.1103/PhysRevB.76.161306

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arXiv