Abstract.
We investigate the influence of transient or permanent elasticity on liquid phases with octupolar (tetrahedral) order, a question that has never been addressed before. The focus will be on optically isotropic liquid phases with tetrahedral order including the T d phase and the chiral T phase introduced by Fel. It turns out that the presence of both, a network as well as tetrahedral order can lead to the formation of chiral domains of both hands in an optically isotropic fluid due to a completely novel mechanism, thus providing a possible macroscopic explanation for recent experimental observations. We study in detail how elasticity influences the macroscopic dynamics of both, the T d and the T phase. The simultaneous presence of a transient network as well as of octupolar order is shown to lead to completely new cross-coupling phenomena for optically isotropic systems including transient dissipative elastic strains due to temperature gradients.
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Brand, H.R., Pleiner, H. On the influence of a network on optically isotropic fluid phases with tetrahedral/octupolar order. Eur. Phys. J. E 40, 34 (2017). https://doi.org/10.1140/epje/i2017-11523-7
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DOI: https://doi.org/10.1140/epje/i2017-11523-7