Thin film liquid crystals with oblique anchoring and boojums
Thin film liquid crystals with oblique anchoring and boojums
复制标题
具有倾斜锚定和 boojums 的薄膜液晶
DOI:
10.1016/j.anihpc.2020.02.002
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Golovaty, Dmitry
中科院分区:
文献类型:
--
作者:
Alama, Stan;Bronsard, Lia;Golovaty, Dmitry
We study a two-dimensional variational problem which arises as a thin-film limit of the Landau-de Gennes energy of nematic liquid crystals. We impose an oblique angle condition for the nematic director on the boundary, via boundary penalization (weak anchoring.) We show that for strong anchoring strength (relative to the usual Ginzburg-Landau length scale parameter), defects will occur in the interior, as in the case of strong (Dirichlet) anchoring, but for weaker anchoring strength all defects will occur on the boundary. These defects will each carry a fractional winding number; such boundary defects are known as “boojums”. The boojums will occur in ordered pairs along the boundary; for angle α∈(0, π 2), they serve to reduce the winding of the phase by steps of 2α and (2 π− 2 α) in order to avoid the formation of interior defects. We determine the number and location of the defects via a Renormalized Energy and numerical simulations.
DOI:
10.1007/s00526-021-02091-6
发表时间:
2021
影响因子:
2.1
作者:
Alama, Stan;Bronsard, Lia;Golovaty, Dmitry;Lamy, Xavier
通讯作者:
Lamy, Xavier
影响因子:
1
作者:
R. Moser
通讯作者:
R. Moser
影响因子:
2.5
作者:
Golovaty, Dmitry;Novack, Michael;Sternberg, Peter;Venkatraman, Raghavendra
通讯作者:
Venkatraman, Raghavendra