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

Journal Article · · Physical Review B
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  1. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics
  2. Tulane Univ., New Orleans, LA (United States)
  3. Military Transportation University, Tianjin (China)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
  5. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)

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.

Research Organization:
Tulane Univ., New Orleans, LA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0014208
OSTI ID:
1535812
Alternate ID(s):
OSTI ID: 1338092
Journal Information:
Physical Review B, Vol. 94, Issue 24; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 143 works
Citation information provided by
Web of Science

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Cited By (51)

Optical Response of MoTe2 and WTe2 Weyl Semimetals: Distinguishing between Bulk and Surface Contributions journal January 2020
Magnetic Susceptibility of Topological Semimetals journal August 2019
Evidence for topological type-II Weyl semimetal WTe2 journal December 2017
Spin-momentum locking and spin-orbit torques in magnetic nano-heterojunctions composed of Weyl semimetal WTe2 journal September 2018
Topological electronic states in HfRuP family superconductors journal December 2019
Concurrence of superconductivity and structure transition in Weyl semimetal TaP under pressure journal December 2017
Temperature-driven topological transition in 1T'-MoTe2 journal January 2018
Searching for topological Fermi arcs via quasiparticle interference on a type-II Weyl semimetal MoTe2 journal August 2018
Switching magnetization with a Weyl semimetal journal August 2019
Magnetic Field Enhanced Superconductivity in Epitaxial Thin Film WTe2 journal April 2018
Mobility spectrum analytical approach for the type-II Weyl semimetal T d -MoTe 2 journal February 2018
Deviation from the Kohler’s rule and Shubnikov–de Haas oscillations in type-II Weyl semimetal WTe 2 : High magnetic field study up to 56 T journal October 2018
Origin of planar Hall effect in type-II Weyl semimetal MoTe 2 journal May 2019
Topological semimetal in honeycomb lattice LnSI journal September 2017
Quasiparticle interference on type-I and type-II Weyl semimetal surfaces: a review journal January 2018
New developments in laser-based photoemission spectroscopy and its scientific applications: a key issues review journal April 2018
Weak-value amplification for Weyl-point separation in momentum space journal October 2018
Few-layer 1T′ MoTe 2 as gapless semimetal with thickness dependent carrier transport journal June 2018
Experimental progress on layered topological semimetals journal April 2019
Spacing dependent and cation doping independent superconductivity in intercalated 1T 2D SnSe 2 journal September 2019
Electronic properties of candidate type-II Weyl semimetal WTe 2 . A review perspective journal March 2019
Large enhancement of conductivity in Weyl semimetals with tilted cones: Pseudorelativity and linear response journal August 2019
Giant optical activity and Kerr effect in type-I and type-II Weyl semimetals journal August 2019
Interplay between tilt, disorder, and Coulomb interaction in type-I Dirac fermions journal September 2019
Quantum oscillations of thermopower in WTe 2 thin films journal December 2019
Type-II Dirac surface states in topological crystalline insulators journal January 2017
Anatomy of topological surface states: Exact solutions from destructive interference on frustrated lattices journal August 2017
ARPES studies of the inverse perovskite Ca 3 PbO : Experimental confirmation of a candidate 3D Dirac fermion system journal October 2017
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Passively Q-switched 1989  μm all-solid-state laser based on a WTe 2 saturable absorber journal January 2018
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