Dynamic Properties of Nematic Liquid Crystals

Blinc, R.; Muevi, I.

doi:10.1002/9783527619276.ch3gb

Handbook of Liquid Crystals Set 1998

DOI: 10.1002/9783527619276.ch3gb

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Dynamic Properties of Nematic Liquid Crystals

R. Blinc¹,

I. Muevi²

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2020

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Twist–Bend Nematic Phase from the Landau–de Gennes Perspective

Longa

Tomczyk

2020

J. Phys. Chem. C

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Generalized Landau–de Gennes theory is proposed that comprehensively explains currently available experimental data for the heliconical twist–bend nematic (NTB) phase observed in liquid crystalline systems of chemically achiral bent-core-like molecules. A bifurcation analysis gives insight into possible structures that the model can predict and guides in the numerical analysis of relative stability of the isotropic (I), uniaxial nematic (NU), and twist–bend nematic phases. An estimate of constitutive parameters of the model from temperature variation of the nematic order parameter and the Frank elastic constants in the nematic phase enables us to demonstrate quantitative agreement between the calculated and experimentally determined temperature dependence of the pitch and conical angle in NTB. Properties of order parameters also explain a puzzling lack of a half-pitch band in resonant soft X-ray scattering. Other key findings of the model are predictions of I–NTB and NU–NTB tricritical points and insight into biaxiality of NTB.

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Twist–Bend Nematic Phase from the Landau–de Gennes Perspective

Longa

Tomczyk

2020

J. Phys. Chem. C

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show abstract

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Dynamic Properties of Nematic Liquid Crystals

Cited by 1 publication

References 199 publications

Twist–Bend Nematic Phase from the Landau–de Gennes Perspective

Twist–Bend Nematic Phase from the Landau–de Gennes Perspective

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