Journal
NANO LETTERS
Volume 20, Issue 10, Pages 7476-7481Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c02962
Keywords
magnetic Weyl semimetal; anomalous Hall effect; high mobility; chemical vapor transport; thin flake
Categories
Funding
- Materials Education program for the future leaders in Research, Industry, and Technology (MERIT)
- JST CREST [JPMJCR16F1, JPMJCR1874]
- JSPS KAKENHI [18J20959, 19H00650, JP19H05610]
- Grants-in-Aid for Scientific Research [18J20959] Funding Source: KAKEN
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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 Co3Sn2S2 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 Co3Sn2S2 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 Co3Sn2S2 thin flakes of high-quality, where we identify the largest electron mobility (similar to 2600 cm(2) V-1 s(-1)) among magnetic topological semimetals, as well as the large anomalous Hall conductivity (similar to 1400 Omega(-1) cm(-1)) and anomalous Hall angle (similar to 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.
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