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Field response and switching times in biaxial nematics
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10.1063/1.2815804
/content/aip/journal/jcp/128/2/10.1063/1.2815804
http://aip.metastore.ingenta.com/content/aip/journal/jcp/128/2/10.1063/1.2815804
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The geometry of the principal , , and secondary , switching experiments described in the text: the director axes are labeled , , and (not shown here), while the external field couples in turn with the molecular , , or axes and generates the torque .

Image of FIG. 2.
FIG. 2.

Dynamics of the field induced reorientation of the principal and secondary director axes of the BXN phase for the experiments of type (dashed), (dotted), and (solid) of Fig. 1, for an external field of magnitude . Each experiment is described by a pair of intersecting curves (one thin, the other thick) with the same drawing style. These lines represent the evolution of selected components of a director axis (with respect to the space-fixed frame) whose values are exchanged by the experiment. Thin (thick) lines are the components parallel (perpendicular) to the field at the beginning of the experiment.

Image of FIG. 3.
FIG. 3.

The plot of the principal , , and secondary , switching times for various commutation experiments of Fig. 1, with field module , 0.20, 0.50, and .

Image of FIG. 4.
FIG. 4.

Dynamics of the instantaneous (a) uniaxial and (b) biaxial order parameters for the transversal switch, type experiments with field , coupled to molecular axis .

Image of FIG. 5.
FIG. 5.

Snapshots of BXN samples relative to a short axis switch virtual experiment of type with field , showing biaxiality disappearance. The snapshots are as viewed from the laboratory axis and have been taken at time steps: (a) , (b) 40 000, (c) 60 000, and (d) 100 000. The particle orientations are color coded according to the palette shown (e), with .

Image of FIG. 6.
FIG. 6.

Dynamics of the instantaneous (a) uniaxial and (b) biaxial order parameters for longitudinal switch, the type experiments with field , coupled to molecular axis .

Image of FIG. 7.
FIG. 7.

Snapshots of BXN samples relative to a long axis switch virtual experiment of type with relatively weak field , showing whole sample rotation. The snapshots are as viewed from the laboratory axis and have been taken at time steps: (a) , (b) 160 000, (c) 240 000, and (d) 320 000. The particles orientations are color coded according to the palette shown (e), with .

Image of FIG. 8.
FIG. 8.

Snapshots of BXN samples relative to a long axis switch virtual experiment of type with strong field , showing order disruption. The snapshots are as viewed from the laboratory axis and have been taken at time steps: (a) , (b) 40 000, (c) 60 000, and (d) 80 000. The particle orientations are color coded according to the palette shown (e), with .

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/content/aip/journal/jcp/128/2/10.1063/1.2815804
2008-01-11
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Field response and switching times in biaxial nematics
http://aip.metastore.ingenta.com/content/aip/journal/jcp/128/2/10.1063/1.2815804
10.1063/1.2815804
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