Nych A B, Ognysta U M, Pergamenshchik V M, Lev B I, Nazarenko V G, Musevic I, Skarabot M, Lavrentovich O D
Institute of Physics, prospekt Nauky, 46, Kiev 03039, Ukraine.
Phys Rev Lett. 2007 Feb 2;98(5):057801. doi: 10.1103/PhysRevLett.98.057801. Epub 2007 Feb 1.
Glycerol droplets at a nematic-liquid-crystal-air interface form two different lattices--hexagonal and dense quasihexagonal--which are separated by the energy barrier and can coexist. Director distortions around each droplet form an elastic dipole. The first order transition between the two lattices is driven by a reduction of the dipole-dipole repulsion through reorientation of these dipoles. The elastic-capillary attraction is essential for the both lattices. The effect has a many-body origin.
向列型液晶-空气界面处的甘油液滴形成两种不同的晶格——六边形和致密准六边形——它们被能垒分隔且能共存。每个液滴周围的指向矢畸变形成一个弹性偶极子。这两种晶格之间的一级转变是由这些偶极子重新取向导致的偶极-偶极排斥力减小所驱动的。弹性毛细吸引力对这两种晶格都至关重要。这种效应具有多体起源。
