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Abstract : Blue Phases are cubic crystals with large unit cells. In two systems we studied we find experimentally that they orient with their 100 axis parallel to an electric field, E. By analysing the non-linear polarizability, which we describe in terms of the relevant fourth rank tensor, we show that cubic blue phase crystals are absolutely stable with their four-fold or threefold axis directed along E, depending on the sign of this tensor.

Mots-clés : cholesteric liquid crystals molecular orientation polarisability

Author: P. Pierański P.E. Cladis T. Garel R. Barbet-Massin

Source: https://hal.archives-ouvertes.fr/


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