### Abstract

Original language | English |
---|---|

Journal | Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics |

Volume | 68 |

DOIs | |

Publication status | Published - 2003 |

### Fingerprint

### Keywords

- continuum theory
- flexoelectricity
- nematic
- Fréedericksz transition
- mathematics
- physics

### Cite this

}

**Influence of flexoelectricity above the nematic Freedericksz transition.** / Brown, C.V.; Mottram, N.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Influence of flexoelectricity above the nematic Freedericksz transition

AU - Brown, C.V.

AU - Mottram, N.

PY - 2003

Y1 - 2003

N2 - Continuum theory is used to demonstrate that the presence of flexoelectricity significantly alters the response to an applied voltage of a homogeneous nematic liquid crystal cell above the ac Fræ#169;edericksz threshold voltage. In such a system there is a fitting degeneracy: we obtain very good fits between theory and experimental permittivity data using any value of the sum of flexoelectric coefficients, e11 + e33, between 0.0 C/m and 1.5×10-11 C/m. The corresponding values of the nematic bend elastic constant show an inverse parabolic relationship with e11 + e33, with K33 being reduced down to 90% of its value when flexoelectricity is neglected.

AB - Continuum theory is used to demonstrate that the presence of flexoelectricity significantly alters the response to an applied voltage of a homogeneous nematic liquid crystal cell above the ac Fræ#169;edericksz threshold voltage. In such a system there is a fitting degeneracy: we obtain very good fits between theory and experimental permittivity data using any value of the sum of flexoelectric coefficients, e11 + e33, between 0.0 C/m and 1.5×10-11 C/m. The corresponding values of the nematic bend elastic constant show an inverse parabolic relationship with e11 + e33, with K33 being reduced down to 90% of its value when flexoelectricity is neglected.

KW - continuum theory

KW - flexoelectricity

KW - nematic

KW - Fréedericksz transition

KW - mathematics

KW - physics

UR - http://dx.doi.org/10.1103/PhysRevE.68.031702

U2 - 10.1103/PhysRevE.68.031702

DO - 10.1103/PhysRevE.68.031702

M3 - Article

VL - 68

JO - Physical Review E

JF - Physical Review E

SN - 1539-3755

ER -