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Title: The effect of spin-orbit coupling on nonsymmorphic square-net compounds

Abstract

In the field of Dirac materials, spin-orbit coupling (SOC) is usually considered disruptive, since it may lift degeneracies that are not protected by high-symmetry elements. Nonsymmorphic symmetries force degenerate points in the band structure at high-symmetry points that are not disrupted by SOC. The degeneracy is, however, often protected along whole high-symmetry lines or faces resulting in highly anisotropic crossings or nodal lines, which can considerably limit the region, in which the bands are linearly dispersed. It has been theoretically suggested that SOC could circumvent this problem. Here, we show experimentally that SOC can lift the extended protection in nonsymmorphic square-net compounds. Here, we compare ZrSiS and CeSbTe, two materials with drastically different SOC, to show the effect of SOC on the band structure by means of angle-resolved photoemission spectroscopy and density functional theory calculations.

Authors:
 [1];  [2];  [3];  [3];  [4];  [4];  [5];  [5];  [1]
  1. Max-Planck-Institut für Festkörperforschung, Stuttgart (Germany); Princeton Univ., Princeton, NJ (United States)
  2. Donostia International Physics Center, Donostia-San Sebastian (Spain)
  3. Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin (Germany)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Max-Planck-Institut für Festkörperforschung, Stuttgart (Germany)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); German Research Foundation (DFG)
OSTI Identifier:
1558996
Alternate Identifier(s):
OSTI ID: 1691917
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics and Chemistry of Solids
Additional Journal Information:
Journal Volume: 128; Journal Issue: C; Journal ID: ISSN 0022-3697
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; D electronic structure; C ab initio calculations; C photoelectron spectroscopy; D surface properties

Citation Formats

Topp, Andreas, Vergniory, Maia G., Krivenkov, Maxim, Varykhalov, Andrei, Rodolakis, Fanny, McChesney, Jessica L., Lotsch, Bettina V., Ast, Christian R., and Schoop, Leslie M. The effect of spin-orbit coupling on nonsymmorphic square-net compounds. United States: N. p., 2017. Web. doi:10.1016/j.jpcs.2017.12.035.
Topp, Andreas, Vergniory, Maia G., Krivenkov, Maxim, Varykhalov, Andrei, Rodolakis, Fanny, McChesney, Jessica L., Lotsch, Bettina V., Ast, Christian R., & Schoop, Leslie M. The effect of spin-orbit coupling on nonsymmorphic square-net compounds. United States. https://doi.org/10.1016/j.jpcs.2017.12.035
Topp, Andreas, Vergniory, Maia G., Krivenkov, Maxim, Varykhalov, Andrei, Rodolakis, Fanny, McChesney, Jessica L., Lotsch, Bettina V., Ast, Christian R., and Schoop, Leslie M. Sat . "The effect of spin-orbit coupling on nonsymmorphic square-net compounds". United States. https://doi.org/10.1016/j.jpcs.2017.12.035. https://www.osti.gov/servlets/purl/1558996.
@article{osti_1558996,
title = {The effect of spin-orbit coupling on nonsymmorphic square-net compounds},
author = {Topp, Andreas and Vergniory, Maia G. and Krivenkov, Maxim and Varykhalov, Andrei and Rodolakis, Fanny and McChesney, Jessica L. and Lotsch, Bettina V. and Ast, Christian R. and Schoop, Leslie M.},
abstractNote = {In the field of Dirac materials, spin-orbit coupling (SOC) is usually considered disruptive, since it may lift degeneracies that are not protected by high-symmetry elements. Nonsymmorphic symmetries force degenerate points in the band structure at high-symmetry points that are not disrupted by SOC. The degeneracy is, however, often protected along whole high-symmetry lines or faces resulting in highly anisotropic crossings or nodal lines, which can considerably limit the region, in which the bands are linearly dispersed. It has been theoretically suggested that SOC could circumvent this problem. Here, we show experimentally that SOC can lift the extended protection in nonsymmorphic square-net compounds. Here, we compare ZrSiS and CeSbTe, two materials with drastically different SOC, to show the effect of SOC on the band structure by means of angle-resolved photoemission spectroscopy and density functional theory calculations.},
doi = {10.1016/j.jpcs.2017.12.035},
journal = {Journal of Physics and Chemistry of Solids},
number = C,
volume = 128,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:

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Cited by: 5 works
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