Khoury, JF;
Rettie, AJE;
Khan, MA;
Ghimire, NJ;
Robredo, I;
Pfluger, JE;
Pal, K;
... Kanatzidis, MG; + view all
(2019)
A New Three-Dimensional Subsulfide Ir₂In₈S with Dirac Semimetal Behavior.
Journal of the American Chemical Society
, 141
(48)
pp. 19130-19137.
10.1021/jacs.9b10147.
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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/Vs at 1.8 K, and a large, non-saturating 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.
| Type: | Article |
|---|---|
| Title: | A New Three-Dimensional Subsulfide Ir₂In₈S with Dirac Semimetal Behavior |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/jacs.9b10147 |
| Publisher version: | https://doi.org/10.1021/jacs.9b10147 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Crystal structure, Magnetic properties, Mobility, Transition metals, Materials |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10085842 |
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