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Signatures of the Magnetic Entropy in the Thermopower Signals in Nanoribbons of the Magnetic Weyl Semimetal Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub>

Signatures of the Magnetic Entropy in the Thermopower Signals in Nanoribbons of the Magnetic Weyl Semimetal Co3Sn2S2

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GEISHENDORF, Kevin, Praveen VIR, Chandra SHEKHAR, Claudia FELSER, Jorge I. FACIO, Jeroen VAN DEN BRINK, Kornelius NIELSCH, Andy THOMAS, Sebastian T. B. GÖNNENWEIN, 2020. Signatures of the Magnetic Entropy in the Thermopower Signals in Nanoribbons of the Magnetic Weyl Semimetal Co3Sn2S2. In: Nano Letters. American Chemical Society (ACS). 20(1), pp. 300-305. ISSN 1530-6984. eISSN 1530-6992. Available under: doi: 10.1021/acs.nanolett.9b03822

@article{Geishendorf2020-01-08Signa-51907, title={Signatures of the Magnetic Entropy in the Thermopower Signals in Nanoribbons of the Magnetic Weyl Semimetal Co3Sn2S2}, year={2020}, doi={10.1021/acs.nanolett.9b03822}, number={1}, volume={20}, issn={1530-6984}, journal={Nano Letters}, pages={300--305}, author={Geishendorf, Kevin and Vir, Praveen and Shekhar, Chandra and Felser, Claudia and Facio, Jorge I. and van den Brink, Jeroen and Nielsch, Kornelius and Thomas, Andy and Gönnenwein, Sebastian T. B.} }

Geishendorf, Kevin Felser, Claudia Weyl semimetals exhibit interesting electronic properties due to their topological band structure. In particular, large anomalous Hall and anomalous Nernst signals are often reported, which allow for a detailed and quantitative study of subtle features. We pattern single crystals of the magnetic Weyl semimetal Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub> into nanoribbon devices using focused ion beam cutting and optical lithography. This approach enables a very precise study of the galvano- and thermomagnetic transport properties. Indeed, we found interesting features in the temperature dependency of the anomalous Hall and Nernst effects. We present an analysis of the data based on the Mott relation and identify in the Nernst response signatures of magnetic fluctuations enhancing the anomalous Nernst conductivity at the magnetic phase transition. Geishendorf, Kevin eng Gönnenwein, Sebastian T. B. van den Brink, Jeroen Thomas, Andy Facio, Jorge I. 2020-01-08 Shekhar, Chandra Vir, Praveen Felser, Claudia Nielsch, Kornelius 2020-11-24T14:11:27Z Nielsch, Kornelius van den Brink, Jeroen 2020-11-24T14:11:27Z Shekhar, Chandra Thomas, Andy Gönnenwein, Sebastian T. B. Vir, Praveen Facio, Jorge I. Signatures of the Magnetic Entropy in the Thermopower Signals in Nanoribbons of the Magnetic Weyl Semimetal Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub> terms-of-use

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