Orientational order in two dimensions from competing interactions at different scales

Details Orientational order in two dimensions from competing interactions at different scales Orientational order in two dimensions from competing interactions at different scales

2008-08-18

arxiv.org/abs/0808.2494v1

Phys. Rev. B 79, 075437 (2009)

Physics

Condensed Matter

Soft Condensed Matter

7 pages, no figures

Scientific paper

10.1103/PhysRevB.79.075437

We discuss orientational order in two dimensions in the context of systems with competing isotropic interactions at different scales. We consider an extension of the Brazovskii model for stripe phases including explicitly quartic terms with nematic symmetry in the energy. We show that leading fluctuations of the mean field nematic solution drive the isotropic-nematic transition into the Kosterlitz-Thouless universality class, i.e. these systems have a thermodynamic phase with orientational quasi-long-range order.

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