601 Pao Yue-Kong Library
Topological defects are fascinating objects permeating in multiple fields. Spherical crystal provides an ideal environment to study the physics of topological defects. In this talk, I will report our recent discovery of topological vacancies in the equilibrium two-dimensional crystalline order, and introduce the dynamic behaviors of self-propelled particles in spherical crystal from the perspective of topological defects. Our journey will start from the classical Thomson problem that is about the regular arrangement of interacting particles confined on sphere.