Pezzutti Aldo D, Vega Daniel A
Department of Physics and Instituto de Física del Sur, Universidad Nacional del Sur-CONICET, Av LN Além 1253, 8000 Bahía Blanca, Argentina.
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jul;84(1 Pt 1):011123. doi: 10.1103/PhysRevE.84.011123. Epub 2011 Jul 18.
We study the dynamics of defect annihilation in flexible crystalline membranes suffering a symmetry-breaking phase transition. The kinetic process leading the system toward equilibrium is described through a Brazovskii-Helfrich-Canham Hamiltonian. In membranes, a negative disclination has a larger energy than a positive disclination. Here we show that this energetic asymmetry does not only affect equilibrium properties, like the Kosterlitz-Thouless transition temperature, but also plays a fundamental role in the dynamic of defects. Both unbinding of dislocations and Carraro-Nelson "antiferromagnetic" interactions between disclinations slow down the dynamics below the Lifshitz-Safran regime observed in flat hexagonal systems.
我们研究了经历对称性破缺相变的柔性晶体膜中缺陷湮灭的动力学。通过Brazovskii-Helfrich-Canham哈密顿量描述了使系统趋向平衡的动力学过程。在膜中，负向位错的能量比正向位错的能量大。在此我们表明，这种能量不对称不仅影响平衡性质，如Kosterlitz-Thouless转变温度，而且在缺陷动力学中也起着基本作用。位错的解离以及位错之间的Carraro-Nelson“反铁磁”相互作用都会使动力学在低于平面六边形系统中观察到的Lifshitz-Safran区域时变慢。
