Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology, Beijing 100081, China; Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing 100081, China.
College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China.
Sci Bull (Beijing). 2022 Feb 26;67(4):375-380. doi: 10.1016/j.scib.2021.10.023. Epub 2021 Nov 2.
The past decade has witnessed a surge of interest in exploring emergent particles in condensed matter systems. Novel particles, emerged as excitations around exotic band degeneracy points, continue to be reported in real materials and artificially engineered systems, but so far, we do not have a complete picture on all possible types of particles that can be achieved. Here, via systematic symmetry analysis and modeling, we accomplish a complete list of all possible particles in time-reversal-invariant systems. This includes both spinful particles such as electron quasiparticles in solids, and spinless particles such as phonons or even excitations in electric-circuit and mechanical networks. We establish detailed correspondence between the particle, the symmetry condition, the effective model, and the topological character. This obtained encyclopedia concludes the search for novel emergent particles and provides concrete guidance to achieve them in physical systems.
过去十年见证了人们对探索凝聚态系统中新兴粒子的浓厚兴趣。新型粒子作为奇异能带简并点周围的激发态，不断在真实材料和人工设计的系统中被报道，但到目前为止，我们还没有一个完整的图景来描述所有可能的粒子类型。在这里，通过系统的对称分析和建模，我们完成了一个完整的时间反演不变系统中所有可能粒子的列表。这包括了自旋粒子，如固体中的电子准粒子，以及自旋为零的粒子，如声子，甚至是电路和机械网络中的激发。我们在粒子、对称条件、有效模型和拓扑特征之间建立了详细的对应关系。这个获得的百科全书总结了对新型新兴粒子的搜索，并为在物理系统中实现它们提供了具体的指导。
