NORMAL-DISTORTION-MODE APPROACH TO LIQUID-CRYSTAL ELASTIC ENERGY

被引:16
作者
SCHMIDT, VH
机构
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D O I
10.1103/PhysRevLett.64.535
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
It is shown that Franks saddle distortion contribution to the nematic liquid-crystal distortional elastic energy is required, in addition to the splay, twist, and bend energies retained in more recent treatments. Normal distortion modes for these four distortions are described. Measurement methods and their interpretations are discussed for the corresponding four elastic constants k11 (splay), k22 (twist), k33 (bend), and k44 (saddle). Previously reported values for k11 and k22 are actually for k11+k44 and k22+k44 respectively. The Nehring-Saupe molecular approach yields k44=(1/2(k11+k22). © 1990 The American Physical Society.
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页码:535 / 538
页数:4
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