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Bistable anchoring of nematics on rough substrates
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Schmid, F. and Cheung, D. (2006) Bistable anchoring of nematics on rough substrates. EUROPHYSICS LETTERS, 76 (2). pp. 243-249. doi:10.1209/epl/i2006-10248-8 ISSN 0295-5075.
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Official URL: http://dx.doi.org/10.1209/epl/i2006-10248-8
Abstract
We analyze the interplay between wetting and anchoring of nematic liquid crystals on disordering, e. g., rough substrates in the framework of the Landau-de Gennes theory, in situations of competing homeotropic and planar easy axes on the substrate and the nematic-isotropic ( NI) interface. The phase diagram for azimuthally symmetric substrates is calculated. We identify two regimes - a strongly coupled regime, where the wetting transition coincides with an anchoring transition, and a weakly coupled regime, where the two are separated. The anchoring transition is first order and switches between homeotropic and planar anchoring. The two competing orientations are metastable over a broad parameter range. Hence such surfaces can be used to generate bistable surfaces.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | EUROPHYSICS LETTERS | ||||
Publisher: | EDP SCIENCES S A | ||||
ISSN: | 0295-5075 | ||||
Official Date: | October 2006 | ||||
Dates: |
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Volume: | 76 | ||||
Number: | 2 | ||||
Number of Pages: | 7 | ||||
Page Range: | pp. 243-249 | ||||
DOI: | 10.1209/epl/i2006-10248-8 | ||||
Publication Status: | Published |
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