对流状态的向列相液晶的结构及其相变

对流状态的向列相液晶的结构及其相变 STRUCTURES AND TRANSITIONS TO A CHAOTIC STATE IN A CONVECTIVE NEMATIC LIQUID CRYSTAL 杨宣东 Yang Xuandong 1 2 first-author R.Ribotta 1 2 A.Joets 1 2 武汉大学物理系 武汉大学物理系 . D. Yang~*), A. Joets and R. Ribotta . D. Yang~*), A. Joets and R. Ribotta Laboratoire de Physique des Solides Universite de Paris,Sud Laboratoire de Physique des Solides Universite de Paris,Sud 在本文里首次介绍:置于电场里的向列相液晶,,将以两种不同的方式进行从有序向无序状态的转变。当外加作用缓慢加强时,出现在无序状态前的,是一组清晰的有序对流结构。当外加作用迅疾加强时,对流结构被由于缺陷引起的一种快速的不均匀相变代替。因此,一种各向异性流体（如向列相液晶）,可以作为一种崭新的体系,用以进行系统从有序向无序转变的一般规律的研究。 We present here the first experimental evidence of two different ways to chaos in a liquid crystal subjected to an electric field. When the constraint is gradually increased there exists a well-defined sequence of ordered flow structures before time-dependent disordered states. When the constraint is rapid, the sequence is replaced by a fast heterogeneous transformation due to the defects Then an anisotropic fluid might be a new model system for the general study of the transition to chaos. 1986-03-01 2021-04-01 3