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TT: Fachverband Tiefe Temperaturen

TT 48: Focus Session: Unconventional Thermoelectric Phenomena and Materials (joint session MA/TT)

TT 48.1: Hauptvortrag

Mittwoch, 20. März 2024, 15:00–15:30, H 1058

Enhanced Nernst effect in van der Waals tellurides — M. Behnami¹, M. Gillig¹, S. Aswartham¹, G. Shipunov¹, D. Efremov¹, B. R. Piening¹, I. V. Morozov¹, K. Ochkan¹, J. Dufouleur¹, V. Kocsis¹, C. Hess^1,5, M. Putti^4,6, F. Caglieris^1,4, B. Büchner^1,2, and •H. Reichlova^1,2,3 — ¹IFW Dresden, Germany — ²IFMP, Technische Universität Dresden, Dresden, Germany — ³Institute of Physics ASCR, Praha, Czech Republic — ⁴CNR-SPIN, Genova, Italy — ⁵Fakultät für Mathematik und Naturwissenschaften, Bergische Universität Wuppertal, Germany — ⁶Department of Physics, University of Genova, Italy

The increase in the Nernst effect and its anomalous component in magnetically ordered materials is actively researched, and I will start the talk with a brief overview of these efforts. Subsequently, I focus on layered van der Waals materials, which have garnered significant attention in current research due to their distinct properties not inherent in bulk compounds. Particularly intriguing are the topologically non-trivial telluride van der Waals type-II Weyl semimetals with substantial spin-orbit coupling. I will present a systematic exploration of the Nernst effect in this family of materials. We identified a large linear segment of the Nernst coefficient that scales with mobility; however, it does not conform to the previously reported Fermi liquid framework.

Keywords: Nernst effect; van der Waals