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Title: Distinct multiple fermionic states in a single topological metal

Abstract

Among the quantum materials that have recently gained interest are the topological insulators, wherein symmetry-protected surface states cross in reciprocal space, and the Dirac nodal-line semimetals, where bulk bands touch along a line in k-space. However, the existence of multiple fermion phases in a single material has not been verified yet. Using angle-resolved photoemission spectroscopy (ARPES) and first-principles electronic structure calculations, we systematically study the metallic material Hf2Te2P and discover properties, which are unique in a single topological quantum material. We experimentally observe weak topological insulator surface states and our calculations suggest additional strong topological insulator surface states. Our first-principles calculations reveal a one-dimensional Dirac crossing—the surface Dirac-node arc—along a high-symmetry direction which is confirmed by our ARPES measurements. This novel state originates from the surface bands of a weak topological insulator and is therefore distinct from the well-known Fermi arcs in semimetals.

Authors:
 [1];  [1];  [2]; ORCiD logo [2]; ORCiD logo [3];  [1]; ORCiD logo [2];  [1];  [1];  [3];  [4]; ORCiD logo [5]; ORCiD logo [2];  [1]
  1. Univ. of Central Florida, Orlando, FL (United States)
  2. Uppsala Univ. (Sweden)
  3. National Taiwan Univ., Taipei (Taiwan)
  4. Polish Academy of Sciences (PAS), Wroclaw (Poland)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)\
Sponsoring Org.:
USDOE
OSTI Identifier:
1484667
Report Number(s):
LA-UR-18-28780
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Hosen, M. Mofazzel, Dimitri, Klauss, Nandy, Ashis K., Aperis, Alex, Sankar, Raman, Dhakal, Gyanendra, Maldonado, Pablo, Kabir, Firoza, Sims, Christopher, Chou, Fangcheng, Kaczorowski, Dariusz, Durakiewicz, Tomasz, Oppeneer, Peter M., and Neupane, Madhab. Distinct multiple fermionic states in a single topological metal. United States: N. p., 2018. Web. doi:10.1038/s41467-018-05233-1.
Hosen, M. Mofazzel, Dimitri, Klauss, Nandy, Ashis K., Aperis, Alex, Sankar, Raman, Dhakal, Gyanendra, Maldonado, Pablo, Kabir, Firoza, Sims, Christopher, Chou, Fangcheng, Kaczorowski, Dariusz, Durakiewicz, Tomasz, Oppeneer, Peter M., & Neupane, Madhab. Distinct multiple fermionic states in a single topological metal. United States. doi:10.1038/s41467-018-05233-1.
Hosen, M. Mofazzel, Dimitri, Klauss, Nandy, Ashis K., Aperis, Alex, Sankar, Raman, Dhakal, Gyanendra, Maldonado, Pablo, Kabir, Firoza, Sims, Christopher, Chou, Fangcheng, Kaczorowski, Dariusz, Durakiewicz, Tomasz, Oppeneer, Peter M., and Neupane, Madhab. Wed . "Distinct multiple fermionic states in a single topological metal". United States. doi:10.1038/s41467-018-05233-1. https://www.osti.gov/servlets/purl/1484667.
@article{osti_1484667,
title = {Distinct multiple fermionic states in a single topological metal},
author = {Hosen, M. Mofazzel and Dimitri, Klauss and Nandy, Ashis K. and Aperis, Alex and Sankar, Raman and Dhakal, Gyanendra and Maldonado, Pablo and Kabir, Firoza and Sims, Christopher and Chou, Fangcheng and Kaczorowski, Dariusz and Durakiewicz, Tomasz and Oppeneer, Peter M. and Neupane, Madhab},
abstractNote = {Among the quantum materials that have recently gained interest are the topological insulators, wherein symmetry-protected surface states cross in reciprocal space, and the Dirac nodal-line semimetals, where bulk bands touch along a line in k-space. However, the existence of multiple fermion phases in a single material has not been verified yet. Using angle-resolved photoemission spectroscopy (ARPES) and first-principles electronic structure calculations, we systematically study the metallic material Hf2Te2P and discover properties, which are unique in a single topological quantum material. We experimentally observe weak topological insulator surface states and our calculations suggest additional strong topological insulator surface states. Our first-principles calculations reveal a one-dimensional Dirac crossing—the surface Dirac-node arc—along a high-symmetry direction which is confirmed by our ARPES measurements. This novel state originates from the surface bands of a weak topological insulator and is therefore distinct from the well-known Fermi arcs in semimetals.},
doi = {10.1038/s41467-018-05233-1},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {8}
}

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