TY - JOUR
T1 - A New Three-Dimensional Subsulfide Ir2In8S with Dirac Semimetal Behavior
AU - Khoury, Jason F.
AU - Rettie, Alexander J.E.
AU - Khan, Mojammel A.
AU - Ghimire, Nirmal J.
AU - Robredo, Iñigo
AU - Pfluger, Jonathan E.
AU - Pal, Koushik
AU - Wolverton, Chris
AU - Bergara, Aitor
AU - Jiang, J. S.
AU - Schoop, Leslie M.
AU - Vergniory, Maia G.
AU - Mitchell, J. F.
AU - Chung, Duck Young
AU - Kanatzidis, Mercouri G.
N1 - Funding Information:
This work was supported by the National Science Foundation (NSF) grant DMR-1708254 (synthesis and structural characterization). Transport and magnetic property measurements were performed at Argonne National Laboratory supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), Materials Sciences and Engineering Division. Single-crystal diffraction data were performed at the IMSERC facility at Northwestern University, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF NNCI-1542205); the State of Illinois; and International Institute for Nanotechnology (IIN). The work for preliminary DFT calculations and partial density of states calculations carried out by J.E.P. and C.W. was supported by the U.S. Department of Energy, Office of Science Basic Energy Sciences grant DE-SC0014520. L.M.S. was supported by NSF through the Princeton Center for Complex Materials, a Materials Research Science and Engineering Center DMR-1420541, and by a MURI grant on Topological Insulators from the Army Research Office, grant number ARO W911NF-12-1-0461. M.G.V. and A.B. acknowledge the IS2016-75862-P and FIS2016-76617-P national projects of the Spanish MINECO and the Department of Education, Universities and Research of the Basque Government and the University of the Basque Country (IT756-13). We acknowledge QUEST, a supercomputer facility at Northwestern University. We thank Dr. Ido Hadar and Daniel G. Chica for assisting in gold evaporation on the samples prior to transport measurements. We also thank Dr. Constantinos C. Stoumpos, and Dr. Kyle M. McCall for helpful discussions.
Funding Information:
This work was supported by the National Science Foundation (NSF) grant DMR-1708254 (synthesis and structural characterization). Transport and magnetic property measurements were performed at Argonne National Laboratory supported by the U.S. Department of Energy (DOE) Office of Science, Basic Energy Sciences (BES), Materials Sciences and Engineering Division. Single-crystal diffraction data were performed at the IMSERC facility at Northwestern University, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF NNCI-1542205); the State of Illinois; and International Institute for Nanotechnology (IIN). The work for preliminary DFT calculations and partial density of states calculations carried out by J.E.P. and C.W. was supported by the U.S. Department of Energy, Office of Science Basic Energy Sciences grant DE-SC0014520. L.M.S. was supported by NSF through the Princeton Center for Complex Materials, a Materials Research Science and Engineering Center DMR-1420541, and by a MURI grant on Topological Insulators from the Army Research Office, grant number ARO W911NF-12-1-0461. M.G.V. and A.B. acknowledge the IS2016-75862-P and FIS2016-76617-P national projects of the Spanish MINECO and the Department of Education, Universities and Research of the Basque Government and the University of the Basque Country (IT756-13). We acknowledge QUEST, a supercomputer facility at Northwestern University. We thank Dr. Ido Hadar and Daniel G. Chica for assisting in gold evaporation on the samples prior to transport measurements. We also thank Dr. Constantinos C. Stoumpos, and Dr. Kyle M. McCall for helpful discussions.
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/12/4
Y1 - 2019/12/4
N2 - 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 &-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.
AB - 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 &-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.
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U2 - 10.1021/jacs.9b10147
DO - 10.1021/jacs.9b10147
M3 - Article
C2 - 31697089
AN - SCOPUS:85075774847
SN - 0002-7863
VL - 141
SP - 19130
EP - 19137
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 48
ER -