三维晶体中的演生粒子百科

Encyclopedia of emergent particles in three-dimensional crystals

在过去10年中,探索凝聚态系统中的演生粒子一直引起人们强烈的研究兴趣.演生粒子是出现在晶体能带简并附近的低能激发模式.自其提出以来,就一直受到人们的广泛关注,并在真实晶体材料和人工设计系统中被广泛报道.然而,至今学界一直还没有得到晶体体系中,所有可能实现的演生粒子的完整图像.本文通过系统的对称性和模型分析,首次完成了三维晶体中所有可能演生粒子的完整列表.该列表不仅包括了固体中电子体系的自旋粒子,也包括声子和人工虚拟晶体等体系中的无自旋粒子.此外,该工作也给出了演生粒子、对称性条件、有效模型和拓扑特征之间的详细对应关系.演生粒子百科的建立结束了在晶体体系中对新的演生粒子的搜寻研究,并为在物理系统中实现相关演生粒子提供了极其具体的指导.

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.