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Title: Three-dimensional nature of the band structure of ZrTe 5 measured by high-momentum-resolution photoemission spectroscopy [3D nature ZrTe 5 band structure measured by high-momentum-resolution photoemission spectroscopy]

Journal Article · · Physical Review B
 [1];  [2];  [1];  [3];  [1];  [4];  [4];  [4];  [3];  [3];  [3];  [4];  [1]
  1. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Nanjing Univ., Jiangsu (China)

Here, we have performed a systematic high-momentum-resolution photoemission study on ZrTe5 using 6-eV photon energy. We have measured the band structure near the Γ point, and quantified the gap between the conduction and valence band as 18 ≤ Δ ≤ 29 meV. We have also observed photon-energy-dependent behavior attributed to final-state effects and the three-dimensional (3D) nature of the material's band structure. Our interpretation indicates the gap is intrinsic and reconciles discrepancies on the existence of a topological surface state reported by different studies. The existence of a gap suggests that ZrTe5 is not a 3D strong topological insulator nor a 3D Dirac semimetal. Therefore, our experiment is consistent with ZrTe5 being a 3D weak topological insulator.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1368695
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 19 Vol. 95; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (19)

Resonant Transmission through Topological Metamaterial Grating journal August 2018
Anomalous Hall effect in ZrTe5 journal March 2018
Quantum Oscillations from Nontrivial States in Quasi-Two-Dimensional Dirac Semimetal ZrTe5 Nanowires journal March 2019
Experimental observation of conductive edge states in weak topological insulator candidate HfTe 5 journal December 2018
The metal-insulator transition in ZrTe 5 induced by temperature journal December 2018
Temperature-driven modification of surface electronic structure on bismuth, a topological border material journal April 2019
Anisotropic Landau level splitting and Lifshitz transition induced magnetoresistance enhancement in ZrTe 5 crystals journal September 2019
Hot carrier dynamics and phonon anharmonicity of ZrTe 5 revealed with femtosecond transient optical spectroscopy journal January 2020
Zeeman-splitting-induced topological nodal structure and anomalous Hall conductivity in ZrTe 5 journal January 2020
Ultrafast hot carrier dynamics of ZrTe 5 from time-resolved optical reflectivity journal March 2019
Detection of sub-MeV dark matter with three-dimensional Dirac materials journal January 2018
Temperature-Driven Topological Phase Transition and Intermediate Dirac Semimetal Phase in ZrTe 5 journal October 2018
Two-Dimensional Conical Dispersion in ZrTe 5 Evidenced by Optical Spectroscopy journal May 2019
Unraveling the topology of ZrTe 5 by changing temperature journal December 2019
Evidence for a strain-tuned topological phase transition in ZrTe 5 journal August 2019
Aspects of the pseudo chiral magnetic effect in 2D Weyl-Dirac matter journal November 2018
Aspects of the pseudo Chiral Magnetic Effect in 2D Weyl-Dirac Matter text January 2018
Evidence for a strain tuned topological phase transition in ZrTe5 text January 2018
Temperature-driven modification of surface electronic structure on bismuth, a topological border material text January 2019

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