Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 56: Topological Semimetals - Experiment (joint session TT/MA)
TT 56.8: Vortrag
Donnerstag, 4. April 2019, 17:00–17:15, H2
Magnetotransport in microribbons of the magnetic Weyl semimetal Co3Sn2S2 — •Kevin Geishendorf1, Richard Schlitz2, Praveen Vir3, Chandra Shekhar3, Claudia Felser3, Kornelius Nielsch1, Sebastian T.B. Goennenwein2, and Andy Thomas1 — 1Leibniz Institute for Solid State and Materials Research Dresden, Institute for Metallic Materials — 2Institut für Festkörper- und Materialphysik — 3Max Planck Institute for Chemical Physics of Solids, Dresden
Magnetic Weyl semimetals exhibit intriguing phenomena due to their non-trivial band structure. Recent experiments in bulk crystals have shown that shandite-type Co3Sn2S2 is a magnetic Weyl semimetal [1,2]. To access the length scales relevant for electrical transport, it is mandatory to fabricate microstructures of this fascinating compound. We therefore have cut microribbons (typical size 0.3 x 3 x 50 µ m3) from Co3Sn2S2 single crystals using a focused beam of Ga2+-ions (FIB) and investigated the impact of the sample dimensions and possible surface doping on the magnetotransport properties. The large intrinsic anomalous Hall effect observed in the microribbons is quantitatively consistent with the one in bulk samples [1]. It is evident from our results that FIB cutting can be used for patterning single crystalline Co3Sn2S2, enabling future transport experiments in complex microstructures of this compound.
E. Liu et al., Nat. Phys. 14, 1125-1131 (2018)
Q. Wang et al., Nat. Commun. 9, 3681 (2018)