Journal
PHYSICAL REVIEW E
Volume 87, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.87.052503
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Funding
- National Science Foundation [DMR-0605889, 1106014]
- Samsung Electronics Corporation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1106014] Funding Source: National Science Foundation
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We develop a Landau theory for bend flexoelectricity in liquid crystals of bent-core molecules. In the nematic phase of the model, the bend flexoelectric coefficient increases as we reduce the temperature toward the nematic to polar phase transition. At this critical point, there is a second-order transition from high-temperature uniform nematic phase to low-temperature nonuniform polar phase composed of twist-bend or splay-bend deformations. To test the predictions of Landau theory, we perform Monte Carlo simulations to find the director and polarization configurations as functions of temperature, applied electric field, and interaction parameters.
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