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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]

Abstract

Here, we have performed a systematic high-momentum-resolution photoemission study on ZrTe 5 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 ZrTe 5 is not a 3D strong topological insulator nor a 3D Dirac semimetal. Therefore, our experiment is consistent with ZrTe 5 being a 3D weak topological insulator.

Authors:
 [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)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1368695
Alternate Identifier(s):
OSTI ID: 1356444
Grant/Contract Number:  
AC02-76SF00515; GBMF4546; 51472112; BK20140019
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 19; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Xiong, H., Sobota, J. A., Yang, S. -L., Soifer, H., Gauthier, A., Lu, M. -H., Lv, Y. -Y., Yao, S. -H., Lu, D., Hashimoto, M., Kirchmann, P. S., Chen, Y. -F., and Shen, Z. -X. Three-dimensional nature of the band structure of ZrTe5 measured by high-momentum-resolution photoemission spectroscopy [3D nature ZrTe5 band structure measured by high-momentum-resolution photoemission spectroscopy]. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.195119.
Xiong, H., Sobota, J. A., Yang, S. -L., Soifer, H., Gauthier, A., Lu, M. -H., Lv, Y. -Y., Yao, S. -H., Lu, D., Hashimoto, M., Kirchmann, P. S., Chen, Y. -F., & Shen, Z. -X. Three-dimensional nature of the band structure of ZrTe5 measured by high-momentum-resolution photoemission spectroscopy [3D nature ZrTe5 band structure measured by high-momentum-resolution photoemission spectroscopy]. United States. doi:10.1103/PhysRevB.95.195119.
Xiong, H., Sobota, J. A., Yang, S. -L., Soifer, H., Gauthier, A., Lu, M. -H., Lv, Y. -Y., Yao, S. -H., Lu, D., Hashimoto, M., Kirchmann, P. S., Chen, Y. -F., and Shen, Z. -X. Wed . "Three-dimensional nature of the band structure of ZrTe5 measured by high-momentum-resolution photoemission spectroscopy [3D nature ZrTe5 band structure measured by high-momentum-resolution photoemission spectroscopy]". United States. doi:10.1103/PhysRevB.95.195119. https://www.osti.gov/servlets/purl/1368695.
@article{osti_1368695,
title = {Three-dimensional nature of the band structure of ZrTe5 measured by high-momentum-resolution photoemission spectroscopy [3D nature ZrTe5 band structure measured by high-momentum-resolution photoemission spectroscopy]},
author = {Xiong, H. and Sobota, J. A. and Yang, S. -L. and Soifer, H. and Gauthier, A. and Lu, M. -H. and Lv, Y. -Y. and Yao, S. -H. and Lu, D. and Hashimoto, M. and Kirchmann, P. S. and Chen, Y. -F. and Shen, Z. -X.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.95.195119},
journal = {Physical Review B},
number = 19,
volume = 95,
place = {United States},
year = {2017},
month = {5}
}

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