Condensed Matter Physics Seminar

2 p.m., Thursday, February 8, 2001
Room 1201, Physics Building

 Liquid Crystal Phases in Quantum Hall Systems

Alan Dorsey

(Department of Physics, University of Florida, Gainesville)

Abstract:  Recent transport measurements of quantum Hall samples in higher Landau levels by Lilly et al. have revealed a surprisingly large anisotropy in the conductivity for nearly half filled Landau levels.  It is now believed that this anisotropy is due to the formation of a unidirectional charge density wave;  the elastic theory of such a state is similar to that of a smectic liquid crystal.  I will discuss the statistical mechanics of this quantum Hall "smectic" phase, including the role of dislocations in restoring the symmetry.

Some references:

Host: Chris Lobb

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