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

Geishendorf K, Vir P, Shekhar C, Felser C, Facio JI, Van Den Brink J, Nielsch K, Thomas A, Goennenwein STB (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Nano Letters American Chemical Society

Book Volume: 20

Pages Range: 300-305

Journal Issue: 1

DOI: 10.1021/acs.nanolett.9b03822

Abstract

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 Co3Sn2S2 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.

Involved external institutions

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden

Germany (DE) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids

Germany (DE) Technische Universität Dresden

Germany (DE)

How to cite

APA:

Geishendorf, K., Vir, P., Shekhar, C., Felser, C., Facio, J.I., Van Den Brink, J.,... Goennenwein, S.T.B. (2020). Signatures of the Magnetic Entropy in the Thermopower Signals in Nanoribbons of the Magnetic Weyl Semimetal Co3Sn2S2. Nano Letters, 20(1), 300-305. https://doi.org/10.1021/acs.nanolett.9b03822

MLA:

Geishendorf, Kevin, et al. "Signatures of the Magnetic Entropy in the Thermopower Signals in Nanoribbons of the Magnetic Weyl Semimetal Co3Sn2S2." Nano Letters 20.1 (2020): 300-305.

BibTeX: Download