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A Discotic Disguised as a Smectic: A Hybrid Columnar Bragg Glass
Physical Review Letters
  • Karl Saunders, University of Oregon
  • Leo Radzihovsky, University of Colorado at Boulder
  • John Toner, University of Oregon
Publication Date

We show that discotics, lying deep in the columnar phase, can exhibit an x-ray scattering pattern which mimics that of a somewhat unusual smectic liquid crystal. This exotic, new glassy phase of columnar liquid crystals, which we call a “hybrid columnar Bragg glass,” can be achieved by confining a columnar liquid crystal in an anisotropic random environment of, e.g., strained aerogel. Long-ranged orientational order in this phase makes single-domain x-ray scattering possible, from which a wealth of information could be extracted. We give detailed quantitative predictions for the scattering pattern in addition to exponents characterizing anomalous elasticity of the system.

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This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society. The following article appeared in Physical Review Letters.
Citation Information
Karl Saunders, Leo Radzihovsky and John Toner. "A Discotic Disguised as a Smectic: A Hybrid Columnar Bragg Glass" Physical Review Letters Vol. 85 Iss. 20 (2000) p. 4309 - 4312
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