Pseudospins and Topological Effects of Phonons in a Kekule Lattice
Pseudospins and Topological Effects of Phonons in a Kekule Lattice
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凯库勒晶格中声子的赝自旋和拓扑效应
DOI：
10.1103/physrevlett.119.255901
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发表时间：
2017
影响因子：
8.6
通讯作者：
Duan Wenhui
中科院分区：
文献类型：
--
作者：
Liu Yizhou;Lian Chao-Sheng;Li Yang;Xu Yong;Duan Wenhui
声子奇异拓扑效应的研究在基础科学和实际应用中都引起了人们极大的兴趣。通过研究Kekulé晶格中的声子，我们发现了一种新的赝自旋，其特征是量子化的Berry相位和赝角动量，它引入了各种新的拓扑效应，包括拓扑保护的赝自旋极化界面态和声子赝自旋Hall效应.我们进一步证明了赝自旋对比光学选择规则和赝自旋塞曼效应，给出了一个完整的生成-操纵-检测声子赝自旋的范例。声子的赝自旋和拓扑相关物理学是普遍的，适用于电子，光子和其他粒子。
The search for exotic topological effects of phonons has attracted enormous interest for both fundamental science and practical applications. By studying phonons in a Kekulé lattice, we find a new type of pseudospin characterized by quantized Berry phases and pseudoangular momenta, which introduces various novel topological effects, including topologically protected pseudospin-polarized interface states and a phonon pseudospin Hall effect. We further demonstrate a pseudospin-contrasting optical selection rule and a pseudospin Zeeman effect, giving a complete generation-manipulation-detection paradigm of the phonon pseudospin. The pseudospin and topology-related physics revealed for phonons is general and applicable for electrons, photons, and other particles.