中文版 | English
Title

Coexistence of charge-2 Dirac and Weyl phonons in chiral space groups

Author
Corresponding AuthorXu,Hu
Publication Years
2022-08-01
DOI
Source Title
ISSN
2469-9950
EISSN
2469-9969
Volume106Issue:5
Abstract
Unconventional topological phonons with unusual properties in crystalline solids have attracted increasing attention. By performing symmetry arguments and low-energy effective Hamiltonian, we confirm the coexistence of charge-2 Dirac and Weyl phonons at high-symmetry points and high-symmetry lines by analyzing all possible space groups. We reveal that such a particular system only emerges in chiral space groups in the presence of time-reversal symmetry. Unlike conventional Weyl pairs with opposite chirality that host one surface arc, there are two surface arcs by connecting one charge-2 Dirac point with topological charge = ±2 and two Weyl points with topological charge = 1. Due to the constraints of symmetry arguments and projection direction in chiral crystals, the surface arcs are long enough to span over the whole surface Brillouin zone. We take Na2Zn2O3 as an example to confirm our predication, and two branches of surface states across the whole surface Brillouin zone are clearly visible. Our work not only presents exotic quasiparticles but also provides an idea for realizing long nontrivial surface arcs.
URL[Source Record]
Indexed By
SCI ; EI
Language
English
Important Publications
NI Journal Papers
SUSTech Authorship
First ; Corresponding
Funding Project
National Natural Science Foundation of China[11974160] ; Science, Technology, and Innovation Commission of Shenzhen Municipality["RCYX20200714114523069","ZDSYS20190902092905285"] ; fund of theGuangdong Provincial Key Laboratory of Computational Science and Material Design[2019B030301001]
WOS Research Area
Materials Science ; Physics
WOS Subject
Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS Accession No
WOS:000862691300003
Publisher
EI Accession Number
20223412609228
EI Keywords
Crystal symmetry ; Sodium compounds ; Topology ; Zinc compounds
ESI Classification Code
Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Crystal Lattice:933.1.1
ESI Research Field
PHYSICS
Scopus EID
2-s2.0-85136132586
Data Source
Scopus
Citation statistics
Cited Times [WOS]:8
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/401630
DepartmentDepartment of Physics
Affiliation
1.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Physics,The Hong Kong University of Science and Technology,Hong Kong,Clear Water Bay,999077,Hong Kong
3.Songshan Lake Materials Laboratory,Dongguan,Guangdong,523808,China
4.Division of Physics and Applied Physics,School of Physical and Mathematical Sciences,Nanyang Technological University,Singapore,637371,Singapore
5.Department of Physics,South China University of Technology,Guangzhou,510640,China
6.Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices,Southern University of Science and Technology,Shenzhen,518055,China
7.Guangdong Provincial Key Laboratory of Computational Science and Material Design,Southern University of Science and Technology,Shenzhen,518055,China
First Author AffilicationDepartment of Physics
Corresponding Author AffilicationDepartment of Physics;  Southern University of Science and Technology
First Author's First AffilicationDepartment of Physics
Recommended Citation
GB/T 7714
Liu,Guang,Huang,Zhenqiao,Chen,Zhongjia,et al. Coexistence of charge-2 Dirac and Weyl phonons in chiral space groups[J]. Physical Review B,2022,106(5).
APA
Liu,Guang,Huang,Zhenqiao,Chen,Zhongjia,Jin,Yuanjun,He,Changchun,&Xu,Hu.(2022).Coexistence of charge-2 Dirac and Weyl phonons in chiral space groups.Physical Review B,106(5).
MLA
Liu,Guang,et al."Coexistence of charge-2 Dirac and Weyl phonons in chiral space groups".Physical Review B 106.5(2022).
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