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Title: A New Three-Dimensional Subsulfide Ir2In8S with Dirac Semimetal Behavior

Abstract

Dirac and Weyl semimetals host exotic quasiparticles with unconventional transport properties, such as high magnetoresistance and carrier mobility. Recent years have witnessed a huge number of newly predicted topological semimetals from existing databases; however, experimental verification often lags behind such predictions. Common reasons are synthetic difficulties or the stability of predicted phases. Here, we report the synthesis of the type-II Dirac semimetal Ir2In8S, an air-stable compound with a new structure type. This material has two Dirac crossings in its electronic structure along the Γ-Z direction of the Brillouin zone. We further show that Ir2In8S has a high electron carrier mobility of ~10 000 cm2/(V s) at 1.8 K and a large, nonsaturating transverse magnetoresistance of ~6000% at 3.34 K in a 14 T applied field. Shubnikov de-Haas oscillations reveal several small Fermi pockets and the possibility of a nontrivial Berry phase. With its facile crystal growth, novel structure type, and striking electronic structure, Ir2In8S introduces a new material system to study topological semimetals and enable advances in the field of topological materials.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [5];  [1];  [1]; ORCiD logo [1];  [6];  [3]; ORCiD logo [7];  [8];  [3];  [3]; ORCiD logo [9]
  1. Northwestern Univ., Evanston, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. College London, Bloomsbury (United Kingdom)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States); George Mason Univ., Fairfax, VA (United States)
  5. Donostia International Physics Center (Spain); Univ. of the Basque Country, Donostia (Spain)
  6. Donostia International Physics Center (Spain); Univ. of the Basque Country, Donostia (Spain); Centro Mixto CSIC-UPV/EHU, Donostia (Spain)
  7. Princeton Univ., NJ (United States)
  8. Donostia International Physics Center (Spain)n; Ikerbasque Basque Foundation for Science (Spain)
  9. Northwestern Univ., Evanston, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF)
OSTI Identifier:
1581283
Alternate Identifier(s):
OSTI ID: 1776865
Grant/Contract Number:  
AC02-06CH11357; SC0014520; DMR-1420541; DMR-1708254
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 141; Journal Issue: 48; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Khoury, Jason F., Rettie, Alexander J. E., Khan, Mojammel A., Ghimire, Nirmal J., Robredo, Iñigo, Pfluger, Jonathan E., Pal, Koushik, Wolverton, Chris, Bergara, Aitor, Jiang, J. S., Schoop, Leslie M., Vergniory, Maia G., Mitchell, J. F., Chung, Duck Young, and Kanatzidis, Mercouri G. A New Three-Dimensional Subsulfide Ir2In8S with Dirac Semimetal Behavior. United States: N. p., 2019. Web. doi:10.1021/jacs.9b10147.
Khoury, Jason F., Rettie, Alexander J. E., Khan, Mojammel A., Ghimire, Nirmal J., Robredo, Iñigo, Pfluger, Jonathan E., Pal, Koushik, Wolverton, Chris, Bergara, Aitor, Jiang, J. S., Schoop, Leslie M., Vergniory, Maia G., Mitchell, J. F., Chung, Duck Young, & Kanatzidis, Mercouri G. A New Three-Dimensional Subsulfide Ir2In8S with Dirac Semimetal Behavior. United States. https://doi.org/10.1021/jacs.9b10147
Khoury, Jason F., Rettie, Alexander J. E., Khan, Mojammel A., Ghimire, Nirmal J., Robredo, Iñigo, Pfluger, Jonathan E., Pal, Koushik, Wolverton, Chris, Bergara, Aitor, Jiang, J. S., Schoop, Leslie M., Vergniory, Maia G., Mitchell, J. F., Chung, Duck Young, and Kanatzidis, Mercouri G. Thu . "A New Three-Dimensional Subsulfide Ir2In8S with Dirac Semimetal Behavior". United States. https://doi.org/10.1021/jacs.9b10147. https://www.osti.gov/servlets/purl/1581283.
@article{osti_1581283,
title = {A New Three-Dimensional Subsulfide Ir2In8S with Dirac Semimetal Behavior},
author = {Khoury, Jason F. and Rettie, Alexander J. E. and Khan, Mojammel A. and Ghimire, Nirmal J. and Robredo, Iñigo and Pfluger, Jonathan E. and Pal, Koushik and Wolverton, Chris and Bergara, Aitor and Jiang, J. S. and Schoop, Leslie M. and Vergniory, Maia G. and Mitchell, J. F. and Chung, Duck Young and Kanatzidis, Mercouri G.},
abstractNote = {Dirac and Weyl semimetals host exotic quasiparticles with unconventional transport properties, such as high magnetoresistance and carrier mobility. Recent years have witnessed a huge number of newly predicted topological semimetals from existing databases; however, experimental verification often lags behind such predictions. Common reasons are synthetic difficulties or the stability of predicted phases. Here, we report the synthesis of the type-II Dirac semimetal Ir2In8S, an air-stable compound with a new structure type. This material has two Dirac crossings in its electronic structure along the Γ-Z direction of the Brillouin zone. We further show that Ir2In8S has a high electron carrier mobility of ~10 000 cm2/(V s) at 1.8 K and a large, nonsaturating transverse magnetoresistance of ~6000% at 3.34 K in a 14 T applied field. Shubnikov de-Haas oscillations reveal several small Fermi pockets and the possibility of a nontrivial Berry phase. With its facile crystal growth, novel structure type, and striking electronic structure, Ir2In8S introduces a new material system to study topological semimetals and enable advances in the field of topological materials.},
doi = {10.1021/jacs.9b10147},
journal = {Journal of the American Chemical Society},
number = 48,
volume = 141,
place = {United States},
year = {Thu Nov 07 00:00:00 EST 2019},
month = {Thu Nov 07 00:00:00 EST 2019}
}

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Works referencing / citing this record:

IrRep: Symmetry eigenvalues and irreducible representations of ab initio band structures
text, January 2022