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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]
+ Show Author Affiliations
  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.
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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. https://doi.org/10.1038/s41467-018-05233-1
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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. https://doi.org/10.1038/s41467-018-05233-1. https://www.osti.gov/servlets/purl/1484667.
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@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 = {Wed Aug 01 00:00:00 EDT 2018},
month = {Wed Aug 01 00:00:00 EDT 2018}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1038/s41467-018-05233-1
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Cited by: 12 works
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Figures / Tables:

Fig. 1 Fig. 1: Crystal structure and sample characterization of Hf2Te2P. a The rhombohedral tetradymite crystal structure of Hf2Te2P, depicted in the conventional (hexagonal) and primitive (rhombohedral) unit cells. The stacking of quintuple layers (QL) is depicted by the blue square. The inversion center is indicated with the red star. b Temperaturemore » dependence of the electrical resistivity measured on a single crystal of Hf2Te2P in a zero (brown circles) and 9 T (orange triangles) magnetic field applied perpendicular to the current flowing within the basal plane of the crystallographic unit cell. The inset shows a picture of one of the single crystal grown for the present research. c Magnetic field dependencies of the transverse magnetoresistance measured for a range of different temperatures on a single crystal of Hf2Te2P with current flowing within the basal plane of the crystallographic unit cell. d 3D bulk Brillouin zone and its projection on the hexagonal surface Brillouin zone of the Hf2Te2P-crystal. High symmetry points are marked in the plot. e Core level spectroscopic measurement of Hf2Te2P. Sharp peaks of Te 4d and Hf 4f are observed which indicate good sample quality« less
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    Works referencing / citing this record:

    Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe
    journal, September 2018

    Strong and Weak 3D Topological Insulators Probed by Surface Science Methods
    text, January 2020

    Strong and Weak 3D Topological Insulators Probed by Surface Science Methods
    journal, May 2020

    Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe
    journal, September 2018

    Observation of multiple Dirac states in a magnetic topological material EuMg2Bi2
    preprint, January 2019

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