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Title: Evolution of the Fermi surface of Weyl semimetals in the transition metal pnictide family

Abstract

Topological Weyl semimetals (TWSs) represent a novel state of topological quantum matter which not only possesses Weyl fermions (massless chiral particles that can be viewed as magnetic monopoles in momentum space) in the bulk and unique Fermi arcs generated by topological surface states, but also exhibits appealing physical properties such as extremely large magnetoresistance and ultra-high carrier mobility. Here, by performing angle-resolved photoemission spectroscopy (ARPES) on NbP and TaP, we directly observed their band structures with characteristic Fermi arcs of TWSs. Furthermore, by systematically investigating NbP, TaP and TaAs from the same transition metal monopnictide family, we discovered their Fermiology evolution with spin-orbit coupling (SOC) strength. Our experimental findings not only reveal the mechanism to realize and fine-tune the electronic structures of TWSs, but also provide a rich material base for exploring many exotic physical phenomena (for example, chiral magnetic effects, negative magnetoresistance, and the quantum anomalous Hall effect) and novel future applications.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [5]; ORCiD logo [7];  [8];  [5];  [3];  [7]; ORCiD logo [7];  [3];  [9];  [10]
  1. ShanghaiTech Univ. (China); Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Science Research Center; Science and Technology Facilities Council (STFC), Harwell Campus, Oxford (United Kingdom). Diamond Light Source, Ltd.
  2. Tsinghua Univ., Beijing (China); Oxford Univ. (United Kingdom); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  3. Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
  4. Tsinghua Univ., Beijing (China); Oxford Univ. (United Kingdom)
  5. Oxford Univ. (United Kingdom)
  6. Oxford Univ. (United Kingdom); Chinese Academy of Sciences (CAS), Shanghai (China)
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  8. ShanghaiTech Univ. (China); Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Science Research Center; Oxford Univ. (United Kingdom)
  9. ShanghaiTech Univ. (China); Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Science Research Center; Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
  10. ShanghaiTech Univ. (China); Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Science Research Center; Science and Technology Facilities Council (STFC), Harwell Campus, Oxford (United Kingdom). Diamond Light Source, Ltd.; Tsinghua Univ., Beijing (China); Oxford Univ. (United Kingdom)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1530220
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nature Materials
Additional Journal Information:
Journal Volume: 15; Journal Issue: 1; Journal ID: ISSN 1476-1122
Publisher:
Springer Nature - Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Liu, Z. K., Yang, L. X., Sun, Y., Zhang, T., Peng, H., Yang, H. F., Chen, C., Zhang, Y., Guo, Y.  F., Prabhakaran, D., Schmidt, M., Hussain, Z., Mo, S. -K., Felser, C., Yan, B., and Chen, Y. L. Evolution of the Fermi surface of Weyl semimetals in the transition metal pnictide family. United States: N. p., 2015. Web. doi:10.1038/nmat4457.
Liu, Z. K., Yang, L. X., Sun, Y., Zhang, T., Peng, H., Yang, H. F., Chen, C., Zhang, Y., Guo, Y.  F., Prabhakaran, D., Schmidt, M., Hussain, Z., Mo, S. -K., Felser, C., Yan, B., & Chen, Y. L. Evolution of the Fermi surface of Weyl semimetals in the transition metal pnictide family. United States. doi:10.1038/nmat4457.
Liu, Z. K., Yang, L. X., Sun, Y., Zhang, T., Peng, H., Yang, H. F., Chen, C., Zhang, Y., Guo, Y.  F., Prabhakaran, D., Schmidt, M., Hussain, Z., Mo, S. -K., Felser, C., Yan, B., and Chen, Y. L. Mon . "Evolution of the Fermi surface of Weyl semimetals in the transition metal pnictide family". United States. doi:10.1038/nmat4457. https://www.osti.gov/servlets/purl/1530220.
@article{osti_1530220,
title = {Evolution of the Fermi surface of Weyl semimetals in the transition metal pnictide family},
author = {Liu, Z. K. and Yang, L. X. and Sun, Y. and Zhang, T. and Peng, H. and Yang, H. F. and Chen, C. and Zhang, Y. and Guo, Y.  F. and Prabhakaran, D. and Schmidt, M. and Hussain, Z. and Mo, S. -K. and Felser, C. and Yan, B. and Chen, Y. L.},
abstractNote = {Topological Weyl semimetals (TWSs) represent a novel state of topological quantum matter which not only possesses Weyl fermions (massless chiral particles that can be viewed as magnetic monopoles in momentum space) in the bulk and unique Fermi arcs generated by topological surface states, but also exhibits appealing physical properties such as extremely large magnetoresistance and ultra-high carrier mobility. Here, by performing angle-resolved photoemission spectroscopy (ARPES) on NbP and TaP, we directly observed their band structures with characteristic Fermi arcs of TWSs. Furthermore, by systematically investigating NbP, TaP and TaAs from the same transition metal monopnictide family, we discovered their Fermiology evolution with spin-orbit coupling (SOC) strength. Our experimental findings not only reveal the mechanism to realize and fine-tune the electronic structures of TWSs, but also provide a rich material base for exploring many exotic physical phenomena (for example, chiral magnetic effects, negative magnetoresistance, and the quantum anomalous Hall effect) and novel future applications.},
doi = {10.1038/nmat4457},
journal = {Nature Materials},
number = 1,
volume = 15,
place = {United States},
year = {2015},
month = {11}
}

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