Topological Lifshitz transition and one-dimensional Weyl mode in HfTe5

Wu, Wenbin1; Shi, Zeping1; Du, Yuhan1; Wang, Yuxiang2,3; Qin, Fang4,5; Meng, Xianghao1; Liu, Binglin1; Ma, Yuanji1; Yan, Zhongbo6; Ozerov, Mykhaylo7; Zhang, Cheng2,3,8; Lu, Hai-Zhou4,5,9; Chu, Junhao10,11,12; Yuan, Xiang1,10

2022-09-01

10.1038/s41563-022-01364-5

NATURE MATERIALS   影响因子和分区

1476-1122

1476-4660

["The manuscript reports on the experimental observation of a Lifshitz transition in a topological insulator HfTe5 subject to a strong magnetic field, which results in the formation of topological one-dimensional Weyl modes in the bulk of a three-dimensional material.","Landau band crossings typically stem from the intra-band evolution of electronic states in magnetic fields and enhance the interaction effect in their vicinity. Here in the extreme quantum limit of topological insulator HfTe5, we report the observation of a topological Lifshitz transition from inter-band Landau level crossings using magneto-infrared spectroscopy. By tracking the Landau level transitions, we demonstrate that band inversion drives the zeroth Landau bands to cross with each other after 4.5 T and forms a one-dimensional Weyl mode with the fundamental gap persistently closed. The unusual reduction of the zeroth Landau level transition activity suggests a topological Lifshitz transition at 21 T, which shifts the Weyl mode close to the Fermi level. As a result, a broad and asymmetric absorption feature emerges due to the Pauli blocking effect in one dimension, along with a distinctive negative magneto-resistivity. Our results provide a strategy for realizing one-dimensional Weyl quasiparticles in bulk crystals."]

SCI ; EI

英语

NI论文

其他

National Natural Science Foundation of China["11925402","12174104","62005079","62111530237","12174069"] ; Shanghai Sailing Program["20YF1402300","20YF1411700"] ; International Scientific and Technological Cooperation Project of Shanghai[20520710900] ; Natural Science Foundation of Shanghai[20ZR1407500] ; National Science Foundation[DMR-1644779]

Chemistry ; Materials Science ; Physics

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

WOS:000863150100002

NATURE PORTFOLIO

20224012837761

Electric insulators ; Topological insulators ; Topology

Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4

MATERIALS SCIENCE

Web of Science

1.East China Normal Univ, State Key Lab Precis Spect, Shanghai, Peoples R China
2.Fudan Univ, State Key Lab Surface Phys, Shanghai, Peoples R China
3.Fudan Univ, Inst Nanoelect Devices & Quantum Comp, Shanghai, Peoples R China
4.Southern Univ Sci & Technol SUSTech, Shenzhen Inst Quantum Sci & Engn, Shenzhen, Peoples R China
5.Southern Univ Sci & Technol SUSTech, Dept Phys, Shenzhen, Peoples R China
6.Sun Yat Sen Univ, Sch Phys, Guangzhou, Peoples R China
7.Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA
8.Fudan Univ, Zhangjiang Fudan Int Innovat Ctr, Shanghai, Peoples R China
9.Shenzhen Key Lab Quantum Sci & Engn, Shenzhen, Peoples R China
10.East China Normal Univ, Sch Phys & Elect Sci, Shanghai, Peoples R China
11.East China Normal Univ, Key Lab Polar Mat & Devices, Minist Educ, Shanghai, Peoples R China
12.Fudan Univ, Inst Optoelect, Shanghai, Peoples R China

Wu, Wenbin,Shi, Zeping,Du, Yuhan,et al. Topological Lifshitz transition and one-dimensional Weyl mode in HfTe5[J]. NATURE MATERIALS,2022,22(1):84-91.

Wu, Wenbin.,Shi, Zeping.,Du, Yuhan.,Wang, Yuxiang.,Qin, Fang.,...&Yuan, Xiang.(2022).Topological Lifshitz transition and one-dimensional Weyl mode in HfTe5.NATURE MATERIALS,22(1),84-91.

Wu, Wenbin,et al."Topological Lifshitz transition and one-dimensional Weyl mode in HfTe5".NATURE MATERIALS 22.1(2022):84-91.