The biaxial nematic phase diagram for the second rank Straley quadrupolar pair potential, as explored until now, implies that a direct transition from a biaxial nematic to an isotropic phase can occur, either at a single Landau point or even, as recently shown using mean field theory, along a line. We show by an extensive Monte Carlo investigation that a different topology can be found in a wide region of parameter space, with the passage from biaxial to isotropic always going through a uniaxial phase. We argue that this may hint in part at the difficulty in realising a biaxial nematic phase.

Does the isotropic–biaxial nematic transition always exist? A new topology for the biaxial nematic phase diagram

BERARDI, ROBERTO;ZANNONI, CLAUDIO
2011

Abstract

The biaxial nematic phase diagram for the second rank Straley quadrupolar pair potential, as explored until now, implies that a direct transition from a biaxial nematic to an isotropic phase can occur, either at a single Landau point or even, as recently shown using mean field theory, along a line. We show by an extensive Monte Carlo investigation that a different topology can be found in a wide region of parameter space, with the passage from biaxial to isotropic always going through a uniaxial phase. We argue that this may hint in part at the difficulty in realising a biaxial nematic phase.
G. Sai Preeti; K.P.N. Murthy; V.S.S. Sastry; C. Chiccoli; P. Pasini; R.Berardi; C. Zannoni
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/109595
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