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Topological Kagome Magnet Co 3 Sn 2 S 2 Thin Flakes with High Electron Mobility and Large Anomalous Hall Effect.
- Source :
-
Nano letters [Nano Lett] 2020 Oct 14; Vol. 20 (10), pp. 7476-7481. Date of Electronic Publication: 2020 Sep 15. - Publication Year :
- 2020
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Abstract
- Magnetic Weyl semimetals attract considerable interest not only for their topological quantum phenomena but also as an emerging materials class for realizing quantum anomalous Hall effect in the two-dimensional limit. A shandite compound Co <subscript>3</subscript> Sn <subscript>2</subscript> S <subscript>2</subscript> with layered kagome-lattices is one such material, where vigorous efforts have been devoted to synthesize the two-dimensional crystal. Here, we report a synthesis of Co <subscript>3</subscript> Sn <subscript>2</subscript> S <subscript>2</subscript> thin flakes with a thickness of 250 nm by chemical vapor transport method. We find that this facile bottom-up approach allows the formation of large-sized Co <subscript>3</subscript> Sn <subscript>2</subscript> S <subscript>2</subscript> thin flakes of high-quality, where we identify the largest electron mobility (∼2600 cm <superscript>2</superscript> V <superscript>-1</superscript> s <superscript>-1</superscript> ) among magnetic topological semimetals, as well as the large anomalous Hall conductivity (∼1400 Ω <superscript>-1</superscript> cm <superscript>-1</superscript> ) and anomalous Hall angle (∼32%) arising from the Berry curvature. Our study provides a viable platform for studying high-quality thin flakes of magnetic Weyl semimetal and stimulate further research on unexplored topological phenomena in the two-dimensional limit.
Details
- Language :
- English
- ISSN :
- 1530-6992
- Volume :
- 20
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- Nano letters
- Publication Type :
- Academic Journal
- Accession number :
- 32897724
- Full Text :
- https://doi.org/10.1021/acs.nanolett.0c02962