期刊
PHYSICAL REVIEW LETTERS
卷 119, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.255901
关键词
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资金
- Ministry of Science and Technology of China [2016YFA0301001]
- National Natural Science Foundation of China [11674188, 11334006]
- National Thousand-Young-Talents Program
- Tsinghua University Initiative Scientific Research Program
The search for exotic topological effects of phonons has attracted enormous interest for both fundamental science and practical applications. By studying phonons in a Kekule 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.
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