Fluctuation-Driven 1st-Order Isotropic-to-Tetrahedratic Phase Transition

Details Fluctuation-Driven 1st-Order Isotropic-to-Tetrahedratic Phase Transition Fluctuation-Driven 1st-Order Isotropic-to-Tetrahedratic Phase Transition

2000-08-22

arxiv.org/abs/cond-mat/0008325v1

Euro. Phys. Lett., 54, (2001) 206

Physics

Condensed Matter

Soft Condensed Matter

4 pgs. RevTex, 2 eps figures, submitted to Europhysics Letters

Scientific paper

10.1209/epl/i2001-00296-0

Motivated in part by recent experiments on liquid crystals with bent-core molecules, which are observed to display a spontaneous chiral symmetry breaking, we introduce a field theory of a 3rd-rank tensor order parameter T^{ijk} to describe the isotropic-to-tetrahedratic phase transition that we predict to take place in these materials. We study the critical properties of the corresponding phase transition and find that this transition, continuous at the mean-field level, is generically driven 1st-order by thermal fluctuations.

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