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Title: Directional massless Dirac fermions in a layered van der Waals material with one-dimensional long-range order

Abstract

One or a few layers of van der Waals (vdW) materials are promising for applications in nanoscale electronics. Established properties include high mobility in graphene, a large direct gap in monolayer MoS2, the quantum spin Hall effect in monolayer WTe2 and so on. These exciting properties arise from electron quantum confinement in the two-dimensional limit. In this work, we use angle-resolved photoemission spectroscopy to reveal directional massless Dirac fermions due to one-dimensional confinement of carriers in the layered vdW material NbSi0.45Te2. The one-dimensional directional massless Dirac fermions are protected by non-symmorphic symmetry, and emerge from a stripe-like structural modulation with long-range translational symmetry only along the stripe direction as we show using scanning tunnelling microscopy. Our work not only provides a playground for investigating further the properties of directional massless Dirac fermions, but also introduces a unique component with one-dimensional long-range order for engineering nano-electronic devices based on heterostructures of vdW materials.

Authors:
 [1];  [1];  [2];  [3];  [4];  [1]; ORCiD logo [5];  [4]; ORCiD logo [6];  [7];  [8];  [8]; ORCiD logo [9];  [9];  [10]; ORCiD logo [1]
+ Show Author Affiliations
  1. Wuhan Univ. (China). Inst. for Advanced Studies
  2. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS); Univ. of Chinese Academy of Sciences, Beijing (China)
  3. Shanghai Jiao Tong Univ. (China). Shenyang National Lab. for Materials Science, Key Lab. of Artificial Structures and Quantum Control
  4. Wuhan Univ. (China)
  5. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Applied Physics, Shanghai Synchrotron Radiation Facility
  6. Univ. of Arkansas, Fayetteville, AR (United States)
  7. Pennsylvania State Univ., University Park, PA (United States)
  8. Singapore Univ. of Technology and Design (Singapore). Research Lab. for Quantum Materials
  9. Shanghai Jiao Tong Univ. (China). Shenyang National Lab. for Materials Science, Key Lab. of Artificial Structures and Quantum Control; Shanghai Jiao Tong Univ. (China). Tsung-Dao Lee Inst.
  10. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS); Univ. of Chinese Academy of Sciences, Beijing (China); Songshan Lake Materials Lab., Dongguan (China)
Publication Date:
Research Org.:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities
OSTI Identifier:
1803545
Alternate Identifier(s):
OSTI ID: 1868531
Grant/Contract Number:  
SC0019068; 2018FYA0305800; 2016YFA0300403; 2017YFA0302901; 11874047; 11674226; 11790313; 11774399; 2042018kf-0030
Resource Type:
Accepted Manuscript
Journal Name:
Nature Materials
Additional Journal Information:
Journal Volume: 19; 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; Electronic properties and materials; Topological insulators; Two-dimensional materials

Citation Formats

Yang, T. Y., Wan, Q., Yan, D. Y., Zhu, Z., Wang, Z. W., Peng, C., Huang, Y. B., Yu, R., Hu, J., Mao, Z. Q., Li, Si, Yang, Shengyuan A., Zheng, Hao, Jia, Jin -Feng, Shi, Y. G., and Xu, N. Directional massless Dirac fermions in a layered van der Waals material with one-dimensional long-range order. United States: N. p., 2019. Web. doi:10.1038/s41563-019-0494-1.
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Yang, T. Y., Wan, Q., Yan, D. Y., Zhu, Z., Wang, Z. W., Peng, C., Huang, Y. B., Yu, R., Hu, J., Mao, Z. Q., Li, Si, Yang, Shengyuan A., Zheng, Hao, Jia, Jin -Feng, Shi, Y. G., & Xu, N. Directional massless Dirac fermions in a layered van der Waals material with one-dimensional long-range order. United States. https://doi.org/10.1038/s41563-019-0494-1
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Yang, T. Y., Wan, Q., Yan, D. Y., Zhu, Z., Wang, Z. W., Peng, C., Huang, Y. B., Yu, R., Hu, J., Mao, Z. Q., Li, Si, Yang, Shengyuan A., Zheng, Hao, Jia, Jin -Feng, Shi, Y. G., and Xu, N. Mon . "Directional massless Dirac fermions in a layered van der Waals material with one-dimensional long-range order". United States. https://doi.org/10.1038/s41563-019-0494-1. https://www.osti.gov/servlets/purl/1803545.
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@article{osti_1803545,
title = {Directional massless Dirac fermions in a layered van der Waals material with one-dimensional long-range order},
author = {Yang, T. Y. and Wan, Q. and Yan, D. Y. and Zhu, Z. and Wang, Z. W. and Peng, C. and Huang, Y. B. and Yu, R. and Hu, J. and Mao, Z. Q. and Li, Si and Yang, Shengyuan A. and Zheng, Hao and Jia, Jin -Feng and Shi, Y. G. and Xu, N.},
abstractNote = {One or a few layers of van der Waals (vdW) materials are promising for applications in nanoscale electronics. Established properties include high mobility in graphene, a large direct gap in monolayer MoS2, the quantum spin Hall effect in monolayer WTe2 and so on. These exciting properties arise from electron quantum confinement in the two-dimensional limit. In this work, we use angle-resolved photoemission spectroscopy to reveal directional massless Dirac fermions due to one-dimensional confinement of carriers in the layered vdW material NbSi0.45Te2. The one-dimensional directional massless Dirac fermions are protected by non-symmorphic symmetry, and emerge from a stripe-like structural modulation with long-range translational symmetry only along the stripe direction as we show using scanning tunnelling microscopy. Our work not only provides a playground for investigating further the properties of directional massless Dirac fermions, but also introduces a unique component with one-dimensional long-range order for engineering nano-electronic devices based on heterostructures of vdW materials.},
doi = {10.1038/s41563-019-0494-1},
journal = {Nature Materials},
number = 1,
volume = 19,
place = {United States},
year = {Mon Oct 07 00:00:00 EDT 2019},
month = {Mon Oct 07 00:00:00 EDT 2019}
}
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https://doi.org/10.1038/s41563-019-0494-1
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