Electron dominated thermoelectric response in MNiSn (M: Ti, Zr, Hf) half-Heusler alloys

Appala Gandi, Udo Schwingenschlögl

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We solve the transport equations of the electrons and phonons to understand the thermoelectric behaviour of the technologically important half-Heusler alloys MNiSn (M: Ti, Zr, Hf). Doping is simulated within the rigid band approximation. We clarify the origin of the electron dominated thermoelectric response and determine the carrier concentrations with maximal figures of merit. The phonon mean free path is studied to calculate the grain size below which grain refinement methods can enforce ballistic heat conduction to enhance the figure of merit. © The Owner Societies 2016.
Original languageEnglish (US)
Pages (from-to)14017-14022
Number of pages6
JournalPhys. Chem. Chem. Phys.
Volume18
Issue number20
DOIs
StatePublished - 2016

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