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Title: Experimental observation of drumhead surface states in SrAs3

Abstract

The topological nodal-line semimetal (TNS) is a unique class of material with a one dimensional line node accompanied by a nearly dispersionless two-dimensional sur- face state. However, a direct observation of the so called drumhead surface state within current nodal-line materials is still elusive. Here, using high-resolution angle- resolved photoemission spectroscopy (ARPES) along with first-principles calculations, we report the observation of a topological nodal-loop (TNL) in SrAs3, whereas CaAs3 exhibits topologically trivial state. Our data reveal that surface projections of the bulk nodal-points are connected by clear drumhead surface states in SrAs3. Furthermore, our magneto-transport and magnetization data clearly suggest the presence (absence) of surface state in SrAs3 (CaAs3). Notably, the observed topological states in RAs3 (R = Ca, Sr) are well separated from other bands in the vicinity of the Fermi level. RAs3, thus, offers a unique opportunity to realize an archetype nodal-loop semimetal and establish a platform for gaining a deeper understanding of the quantum phase transitions.

Authors:
 [1];  [1];  [2]; ORCiD logo [3];  [1];  [1];  [1];  [1]; ORCiD logo [3];  [4];  [2];  [1]
  1. Univ. of Central Florida, Orlando, FL (United States)
  2. Northeastern Univ., Boston, MA (United States)
  3. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  4. Polish Academy of Sciences (PAS), Wroclaw (Poland). Inst. of Low Temperature and Structure Research; Polish Academy of Sciences (PAS), Poznań (Poland). Inst. of Molecular Physics
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
DOE office of science, Early Career Program; INL LDRD
OSTI Identifier:
1616026
Report Number(s):
INL/JOU-19-55600-Rev000
Journal ID: ISSN 2045-2322
Grant/Contract Number:  
AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; topological systems

Citation Formats

Hosen, M. Mofazzel, Dhakal, Gyanendra, Wang, Baokai, Poudel, Narayan, Kabir, Firoza, Dimitri, Klauss, Sims, Christopher, Regmi, Sabin, Gofryk, Krzysztof, Kaczorowski, Dariusz, Bansil, Arun, and Neupane, Madhab. Experimental observation of drumhead surface states in SrAs3. United States: N. p., 2020. Web. https://doi.org/10.1038/s41598-020-59200-2.
Hosen, M. Mofazzel, Dhakal, Gyanendra, Wang, Baokai, Poudel, Narayan, Kabir, Firoza, Dimitri, Klauss, Sims, Christopher, Regmi, Sabin, Gofryk, Krzysztof, Kaczorowski, Dariusz, Bansil, Arun, & Neupane, Madhab. Experimental observation of drumhead surface states in SrAs3. United States. https://doi.org/10.1038/s41598-020-59200-2
Hosen, M. Mofazzel, Dhakal, Gyanendra, Wang, Baokai, Poudel, Narayan, Kabir, Firoza, Dimitri, Klauss, Sims, Christopher, Regmi, Sabin, Gofryk, Krzysztof, Kaczorowski, Dariusz, Bansil, Arun, and Neupane, Madhab. Mon . "Experimental observation of drumhead surface states in SrAs3". United States. https://doi.org/10.1038/s41598-020-59200-2. https://www.osti.gov/servlets/purl/1616026.
@article{osti_1616026,
title = {Experimental observation of drumhead surface states in SrAs3},
author = {Hosen, M. Mofazzel and Dhakal, Gyanendra and Wang, Baokai and Poudel, Narayan and Kabir, Firoza and Dimitri, Klauss and Sims, Christopher and Regmi, Sabin and Gofryk, Krzysztof and Kaczorowski, Dariusz and Bansil, Arun and Neupane, Madhab},
abstractNote = {The topological nodal-line semimetal (TNS) is a unique class of material with a one dimensional line node accompanied by a nearly dispersionless two-dimensional sur- face state. However, a direct observation of the so called drumhead surface state within current nodal-line materials is still elusive. Here, using high-resolution angle- resolved photoemission spectroscopy (ARPES) along with first-principles calculations, we report the observation of a topological nodal-loop (TNL) in SrAs3, whereas CaAs3 exhibits topologically trivial state. Our data reveal that surface projections of the bulk nodal-points are connected by clear drumhead surface states in SrAs3. Furthermore, our magneto-transport and magnetization data clearly suggest the presence (absence) of surface state in SrAs3 (CaAs3). Notably, the observed topological states in RAs3 (R = Ca, Sr) are well separated from other bands in the vicinity of the Fermi level. RAs3, thus, offers a unique opportunity to realize an archetype nodal-loop semimetal and establish a platform for gaining a deeper understanding of the quantum phase transitions.},
doi = {10.1038/s41598-020-59200-2},
journal = {Scientific Reports},
number = 1,
volume = 10,
place = {United States},
year = {2020},
month = {2}
}

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