Acoustic spin-1 Weyl semimetal

被引：23

作者：

Deng, WeiYin ^{[1
]}

Huang, XueQin ^{[1
]}

Lu, JiuYang ^{[1
]}

Li, Feng ^{[1
]}

Ma, JiaHong ^{[1
]}

Chen, ShuQi ^{[3
]}

Liu, ZhengYou ^{[2
,4
]}

机构：

[1] South China Univ Technol, Sch Phys & Optoelect, Guangzhou 510640, Peoples R China

[2] Wuhan Univ, Sch Phys & Technol, Minist Educ, Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Peoples R China

[3] Nankai Univ, Sch Phys, Minist Educ, Key Lab Weak Light Nonlinear Photon, Tianjin 300071, Peoples R China

[4] Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China

来源：

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2020年 / 63卷 / 08期

基金：

中国国家自然科学基金;

关键词：

spin-1 Weyl point; phononic crystal; topological surface states; DIRAC SEMIMETAL; DISCOVERY;

D O I：

10.1007/s11433-020-1558-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The study of topological semimetals hosting spin-1 Weyl points (WPs) beyond Dirac points and WPs has attracted a great deal of attention. However, a spin-1 Weyl semimetal that exclusively possesses spin-1 WPs in a clean frequency window without being shadowed by any other nodal points is yet to be discovered. This study reports a spin-1 Weyl semimetal in a phononic crystal. Its spin-1 WPs are touched by two linear dispersions and an additional flat band and carry monopole charges (-2,0,2) or (2,0,-2) for the three bands from the bottom to the top. They result in double Fermi arcs, which occur between the first and second bands, as well as between the second and third bands. Further robust propagation is observed against the multiple joints and topological negative refraction of the acoustic surface arc wave. The results of this study create the basis for the exploration of the unusual properties of spin-1 Weyl physics on a macroscopic scale.

引用

页数：6

共 48 条

[1] Weyl and Dirac semimetals in three-dimensional solids [J].

Armitage, N. P. ;

Mele, E. J. ;

Vishwanath, Ashvin .

REVIEWS OF MODERN PHYSICS, 2018, 90 (01)

[2] Discovery of coexisting Dirac and triply degenerate magnons in a three-dimensional antiferromagnet [J].

Bao, Song ;

Wang, Jinghui ;

Wang, Wei ;

Cai, Zhengwei ;

Li, Shichao ;

Ma, Zhen ;

Wang, Di ;

Ran, Kejing ;

Dong, Zhao-Yang ;

Abernathy, D. L. ;

Yu, Shun-Li ;

Wan, Xiangang ;

Li, Jian-Xin ;

Wen, Jinsheng .

NATURE COMMUNICATIONS, 2018, 9

[3] Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals [J].

Bradlyn, Barry ;

Cano, Jennifer ;

Wang, Zhijun ;

Vergniory, M. G. ;

Felser, C. ;

Cava, R. J. ;

Bernevig, B. Andrei .

SCIENCE, 2016, 353 (6299)

[4] Topological semimetals [J].

Burkov, A. A. .

NATURE MATERIALS, 2016, 15 (11) :1145-1148

[5] Topological nodal semimetals [J].

Burkov, A. A. ;

Hook, M. D. ;

Balents, Leon .

PHYSICAL REVIEW B, 2011, 84 (23)

[6] Unconventional Chiral Fermions and Large Topological Fermi Arcs in RhSi [J].

Chang, Guoqing ;

Xu, Su-Yang ;

Wieder, Benjamin J. ;

Sanchez, Daniel S. ;

Huang, Shin-Ming ;

Belopolski, Ilya ;

Chang, Tay-Rong ;

Zhang, Songtian ;

Bansil, Arun ;

Lin, Hsin ;

Hasan, M. Zahid .

PHYSICAL REVIEW LETTERS, 2017, 119 (20)

[7] Chiral optical response of multifold fermions [J].

Flicker, Felix ;

de Juan, Fernando ;

Bradlyn, Barry ;

Morimoto, Takahiro ;

Vergniory, Maia G. ;

Grushin, Adolfo G. .

PHYSICAL REVIEW B, 2018, 98 (15)

[8] Geometrically protected triple-point crossings in an optical lattice [J].

Fulga, I. C. ;

Fallani, L. ;

Burrello, M. .

PHYSICAL REVIEW B, 2018, 97 (12)

[9] Experimental Observation of Acoustic Weyl Points and Topological Surface States [J].

Ge, Hao ;

Ni, Xu ;

Tian, Yuan ;

Gupta, Samit Kumar ;

Lu, Ming-Hui ;

Lin, Xin ;

Huang, Wei-Dong ;

Chan, C. T. ;

Chen, Yan-Feng .

PHYSICAL REVIEW APPLIED, 2018, 10 (01)

[10] Topological nodal line states in three-dimensional ball-and-stick sonic crystals [J].

Geng, Zhi-Guo ;

Peng, Yu-Gui ;

Shen, Ya-Xi ;

Ma, Zhen ;

Yu, Rui ;

Gao, Jin-Hua ;

Zhu, Xue-Feng .

PHYSICAL REVIEW B, 2019, 100 (22)

← 1 2 3 4 5 →