Mean-field model for a mixture of biaxial nematogens and dipolar nanoparticles
arxiv(2023)
摘要
We analyze a mean-field model for mixtures involving biaxial nematogens and
dipolar nanoparticles, taking into account orientational and isotropic pair
interactions between nematogens, but also orientational nematogen-nanoparticle
interactions. We determine bulk equilibrium phase diagrams for a wide range of
interaction strengths, identifying in each case the effect of the nanoparticles
on the stability of nematic phases and on the appearance of multicritical
points. Special attention is given to the limit of low concentration of
nanoparticles, in which their effect on the temperatures of both the
first-order uniaxial-isotropic and the continuous biaxial-uniaxial transitions
is investigated in detail.
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