Thermoelectric properties of silicides with topologically non-trivial electronic structure: Co1-xMxSi (M=Fe, Ni)

Burkov AT, Ivanov YV, Nielsch K, Novikov SV, Perez NR, Pshenay-Severin DA, Reith H, Schnatmann LU, Schierning G, Volkov MP (2019)

Publication Type: Conference contribution

Publication year: 2019

Journal

Materials Today: Proceedings Elsevier

Publisher: Elsevier Ltd

Book Volume: 8

Pages Range: 540-545

Conference Proceedings Title: Materials Today: Proceedings

Event location: Padua, ITA

DOI: 10.1016/j.matpr.2019.02.051

Abstract

We present experimental and theoretical results on electronic structure and thermoelectric properties (electrical resistivity and Seebeck coefficient) of Co1−xMxSi (M=Fe, Ni) compounds. Cobalt monosilicide, CoSi, is a recent candidate to the family of materials with topologically non-trivial electronic structure. Moreover, the compound has been considered as a promising thermoelectric material. According to literature data the maximum experimental thermoelectric efficiency parameter ZT of CoSi is close to 0.2. The combination of the unique electronic structure, promising thermoelectric properties and phase stability in a broad temperature range makes CoSi suitable to study the effect of topological states, both bulk and surface (Fermi arcs), on thermoelectric properties. We measured thermoelectric properties (Seebeck coefficient and electrical resistivity) of Co1−xMxSi from 4 K to 800 K. Electronic structure of the compounds was calculated using density functional theory as implemented in VASP software package. Possible connections of the observed peculiarities in the thermoelectric properties with topological features in the electronic structure of the compounds are discussed.

Involved external institutions

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE) Ioffe Physical-Technical Institute / Физико-технический институт имени А. Ф. Иоффе РАН RU Russian Federation (RU)

How to cite

APA:

Burkov, A.T., Ivanov, Y.V., Nielsch, K., Novikov, S.V., Perez, N.R., Pshenay-Severin, D.A.,... Volkov, M.P. (2019). Thermoelectric properties of silicides with topologically non-trivial electronic structure: Co1-xMxSi (M=Fe, Ni). In Stefano Boldrini, Stefania Fiameni, Simone Battiston, Monica Fabrizio, Dario Narducci, Alberto Castellero, Carlo Fanciulli (Eds.), Materials Today: Proceedings (pp. 540-545). Padua, ITA: Elsevier Ltd.

MLA:

Burkov, A. T., et al. "Thermoelectric properties of silicides with topologically non-trivial electronic structure: Co1-xMxSi (M=Fe, Ni)." Proceedings of the 15th European Conference on Thermoelectrics, ECT 2017, Padua, ITA Ed. Stefano Boldrini, Stefania Fiameni, Simone Battiston, Monica Fabrizio, Dario Narducci, Alberto Castellero, Carlo Fanciulli, Elsevier Ltd, 2019. 540-545.

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