Observation of Fermi arc and its connection with bulk states in the candidate type-II Weyl semimetal WTe2

Chenlu Wang, Yan Zhang, Jianwei Huang, Simin Nie, Guodong Liu, Aiji Liang, Yuxiao Zhang, Bing Shen, Jing Liu, Cheng Hu, Ying Ding, Defa Liu, Yong Hu, Shaolong He, Lin Zhao, Li Yu, Jin Hu, Jiang Wei, Zhiqiang Mao, Youguo ShiXiaowen Jia, Fengfeng Zhang, Shenjin Zhang, Feng Yang, Zhimin Wang, Qinjun Peng, Hongming Weng, Xi Dai, Zhong Fang, Zuyan Xu, Chuangtian Chen, X. J. Zhou

Research output: Contribution to journalArticle

113 Citations (Scopus)

Abstract

A kind of topological material, the type-II Weyl semimetal, was proposed recently where the Weyl points emerge at the contact points of the electron and hole pockets, resulting in a highly tilted Weyl cone. In type-II Weyl semimetals, the Lorentz invariance is violated and a different type of Weyl fermion is generated that leads to intriguing physical properties. WTe2 is interesting because it is predicted to be a good candidate for realizing type-II Weyl semimetals. By utilizing laser-based angle-resolved photoemission spectroscopy with high energy and momentum resolutions, we have revealed a full picture of the electronic structure of WTe2. A clear surface state has been identified and its connection with the bulk electronic states in the momentum and energy space shows good agreement with band structure calculations. Our results provide electronic signatures that are consistent with type-II Weyl states in WTe2. They lay a foundation for further investigations on the topological nature of WTe2 and the exploration of unique phenomena and physical properties in type-II Weyl semimetals.

Original languageEnglish (US)
Article number241119
JournalPhysical Review B
Volume94
Issue number24
DOIs
StatePublished - Dec 30 2016

Fingerprint

Metalloids
metalloids
arcs
Momentum
Physical properties
physical properties
momentum
Fermions
Point contacts
Surface states
Electronic states
Photoelectron spectroscopy
Invariance
electronics
Band structure
Electronic structure
Cones
invariance
cones
photoelectric emission

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Wang, Chenlu ; Zhang, Yan ; Huang, Jianwei ; Nie, Simin ; Liu, Guodong ; Liang, Aiji ; Zhang, Yuxiao ; Shen, Bing ; Liu, Jing ; Hu, Cheng ; Ding, Ying ; Liu, Defa ; Hu, Yong ; He, Shaolong ; Zhao, Lin ; Yu, Li ; Hu, Jin ; Wei, Jiang ; Mao, Zhiqiang ; Shi, Youguo ; Jia, Xiaowen ; Zhang, Fengfeng ; Zhang, Shenjin ; Yang, Feng ; Wang, Zhimin ; Peng, Qinjun ; Weng, Hongming ; Dai, Xi ; Fang, Zhong ; Xu, Zuyan ; Chen, Chuangtian ; Zhou, X. J. / Observation of Fermi arc and its connection with bulk states in the candidate type-II Weyl semimetal WTe2. In: Physical Review B. 2016 ; Vol. 94, No. 24.
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abstract = "A kind of topological material, the type-II Weyl semimetal, was proposed recently where the Weyl points emerge at the contact points of the electron and hole pockets, resulting in a highly tilted Weyl cone. In type-II Weyl semimetals, the Lorentz invariance is violated and a different type of Weyl fermion is generated that leads to intriguing physical properties. WTe2 is interesting because it is predicted to be a good candidate for realizing type-II Weyl semimetals. By utilizing laser-based angle-resolved photoemission spectroscopy with high energy and momentum resolutions, we have revealed a full picture of the electronic structure of WTe2. A clear surface state has been identified and its connection with the bulk electronic states in the momentum and energy space shows good agreement with band structure calculations. Our results provide electronic signatures that are consistent with type-II Weyl states in WTe2. They lay a foundation for further investigations on the topological nature of WTe2 and the exploration of unique phenomena and physical properties in type-II Weyl semimetals.",
author = "Chenlu Wang and Yan Zhang and Jianwei Huang and Simin Nie and Guodong Liu and Aiji Liang and Yuxiao Zhang and Bing Shen and Jing Liu and Cheng Hu and Ying Ding and Defa Liu and Yong Hu and Shaolong He and Lin Zhao and Li Yu and Jin Hu and Jiang Wei and Zhiqiang Mao and Youguo Shi and Xiaowen Jia and Fengfeng Zhang and Shenjin Zhang and Feng Yang and Zhimin Wang and Qinjun Peng and Hongming Weng and Xi Dai and Zhong Fang and Zuyan Xu and Chuangtian Chen and Zhou, {X. J.}",
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Wang, C, Zhang, Y, Huang, J, Nie, S, Liu, G, Liang, A, Zhang, Y, Shen, B, Liu, J, Hu, C, Ding, Y, Liu, D, Hu, Y, He, S, Zhao, L, Yu, L, Hu, J, Wei, J, Mao, Z, Shi, Y, Jia, X, Zhang, F, Zhang, S, Yang, F, Wang, Z, Peng, Q, Weng, H, Dai, X, Fang, Z, Xu, Z, Chen, C & Zhou, XJ 2016, 'Observation of Fermi arc and its connection with bulk states in the candidate type-II Weyl semimetal WTe2', Physical Review B, vol. 94, no. 24, 241119. https://doi.org/10.1103/PhysRevB.94.241119

Observation of Fermi arc and its connection with bulk states in the candidate type-II Weyl semimetal WTe2. / Wang, Chenlu; Zhang, Yan; Huang, Jianwei; Nie, Simin; Liu, Guodong; Liang, Aiji; Zhang, Yuxiao; Shen, Bing; Liu, Jing; Hu, Cheng; Ding, Ying; Liu, Defa; Hu, Yong; He, Shaolong; Zhao, Lin; Yu, Li; Hu, Jin; Wei, Jiang; Mao, Zhiqiang; Shi, Youguo; Jia, Xiaowen; Zhang, Fengfeng; Zhang, Shenjin; Yang, Feng; Wang, Zhimin; Peng, Qinjun; Weng, Hongming; Dai, Xi; Fang, Zhong; Xu, Zuyan; Chen, Chuangtian; Zhou, X. J.

In: Physical Review B, Vol. 94, No. 24, 241119, 30.12.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Observation of Fermi arc and its connection with bulk states in the candidate type-II Weyl semimetal WTe2

AU - Wang, Chenlu

AU - Zhang, Yan

AU - Huang, Jianwei

AU - Nie, Simin

AU - Liu, Guodong

AU - Liang, Aiji

AU - Zhang, Yuxiao

AU - Shen, Bing

AU - Liu, Jing

AU - Hu, Cheng

AU - Ding, Ying

AU - Liu, Defa

AU - Hu, Yong

AU - He, Shaolong

AU - Zhao, Lin

AU - Yu, Li

AU - Hu, Jin

AU - Wei, Jiang

AU - Mao, Zhiqiang

AU - Shi, Youguo

AU - Jia, Xiaowen

AU - Zhang, Fengfeng

AU - Zhang, Shenjin

AU - Yang, Feng

AU - Wang, Zhimin

AU - Peng, Qinjun

AU - Weng, Hongming

AU - Dai, Xi

AU - Fang, Zhong

AU - Xu, Zuyan

AU - Chen, Chuangtian

AU - Zhou, X. J.

PY - 2016/12/30

Y1 - 2016/12/30

N2 - A kind of topological material, the type-II Weyl semimetal, was proposed recently where the Weyl points emerge at the contact points of the electron and hole pockets, resulting in a highly tilted Weyl cone. In type-II Weyl semimetals, the Lorentz invariance is violated and a different type of Weyl fermion is generated that leads to intriguing physical properties. WTe2 is interesting because it is predicted to be a good candidate for realizing type-II Weyl semimetals. By utilizing laser-based angle-resolved photoemission spectroscopy with high energy and momentum resolutions, we have revealed a full picture of the electronic structure of WTe2. A clear surface state has been identified and its connection with the bulk electronic states in the momentum and energy space shows good agreement with band structure calculations. Our results provide electronic signatures that are consistent with type-II Weyl states in WTe2. They lay a foundation for further investigations on the topological nature of WTe2 and the exploration of unique phenomena and physical properties in type-II Weyl semimetals.

AB - A kind of topological material, the type-II Weyl semimetal, was proposed recently where the Weyl points emerge at the contact points of the electron and hole pockets, resulting in a highly tilted Weyl cone. In type-II Weyl semimetals, the Lorentz invariance is violated and a different type of Weyl fermion is generated that leads to intriguing physical properties. WTe2 is interesting because it is predicted to be a good candidate for realizing type-II Weyl semimetals. By utilizing laser-based angle-resolved photoemission spectroscopy with high energy and momentum resolutions, we have revealed a full picture of the electronic structure of WTe2. A clear surface state has been identified and its connection with the bulk electronic states in the momentum and energy space shows good agreement with band structure calculations. Our results provide electronic signatures that are consistent with type-II Weyl states in WTe2. They lay a foundation for further investigations on the topological nature of WTe2 and the exploration of unique phenomena and physical properties in type-II Weyl semimetals.

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