Ideal type-III nodal-ring phonons

Zheng, Baobing1,2,3,4; Xia, Bowen1,2; Wang, Rui5,6; Chen, Zhongjia1,2,7; Zhao, Jinzhu1,2; Zhao, Yujun7; Xu, Hu1,2

2020-03-18

10.1103/PhysRevB.101.100303

PHYSICAL REVIEW B   影响因子和分区

2469-9950

2469-9969

Type-III nodal ring associated with a flat band without dispersion, whose nodes are the critical states between type-I and type-II Dirac/Weyl nodes, is of great interest. Here, we propose a strategy to explore and design materials that can realize the type-III nodal-ring phonons by introducing two-dimensional (2D) lattices with ideal flat band. As a concrete example, we show by first-principles calculations that the Laves phase AB(2) with C14 structure possesses ideal type-III nodal-ring phonons. The flat phonon band related to type-III nodal-ring phonons originates from their 2D triangular and kagome layers in the Laves phase AB(2). The type-III nodal-ring phonons with nontrivial Berry phase lie on a reflection-invariant plane, which are protected by the inversion and time-reversal symmetries. In addition, the drumhead surface states and unique surface arcs are clearly visible, which facilitate experimental observations. Our work enriches the classification of topological quantum phases, and provides a feasible strategy in designing flat-band related topological phases.

SCI ; EI

英语

NI论文

第一 ; 通讯

Natural Science Basic Research plan in Shaanxi Province of China[2018JQ1083]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000519989300002

AMER PHYSICAL SOC

20201608431376

Calculations ; Topology

Mathematics:921 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
3.Baoji Univ Arts & Sci, Coll Phys & Optoelect Technol, Baoji 721016, Peoples R China
4.Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China
5.Chongqing Univ, Inst Struct & Funct, Chongqing 400044, Peoples R China
6.Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China
7.South China Univ Technol, Dept Phys, Guangzhou 510640, Peoples R China

Zheng, Baobing,Xia, Bowen,Wang, Rui,et al. Ideal type-III nodal-ring phonons[J]. PHYSICAL REVIEW B,2020,101(10).

Zheng, Baobing.,Xia, Bowen.,Wang, Rui.,Chen, Zhongjia.,Zhao, Jinzhu.,...&Xu, Hu.(2020).Ideal type-III nodal-ring phonons.PHYSICAL REVIEW B,101(10).

Zheng, Baobing,et al."Ideal type-III nodal-ring phonons".PHYSICAL REVIEW B 101.10(2020).