Science. 1995 Feb 3;267(5198):651-4. doi: 10.1126/science.267.5198.651.
Dynamic surface force measurements of the response of a smectic A to layer normal stress exhibited time dependence for topological events in which single smectic layers were added or removed. Single layer-sized jumps in sample thickness had a rapid component of duration of approximately 1 second that produced most of the change in separation, but that was heralded by a slow precursor acceleration in separation, which began up to a few hundred seconds before. This avalanche-like dynamic signature is consistent with a relaxation mechanism based on the Glaberson-Clem-Bourdon instability of vortex lines (screw dislocations) in the smectic order parameter.
动态表面力测量显示，向列 A 各向异性层施加法向应力时，拓扑事件的响应表现出时间依赖性，在此过程中，单层或多层向列相被添加或移除。样品厚度的单层层大小跳跃具有约 1 秒的快速持续时间，该持续时间产生了大部分分离变化，但在此之前，分离的缓慢前导加速已经开始，其可以提前数百秒开始。这种类似雪崩的动态特征与基于 Glaberson-Clem-Bourdon 涡旋线（螺旋位错）不稳定性的松弛机制一致，该机制存在于向列有序参数中。
