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Intrinsic effects of substitution and intercalation on thermal transport in two-dimensional TiS2 single crystals

R. Daou 1 H. Takahashi 2, 1, 3 S. Hébert 1 M. Beaumale 2, 1 E. Guilmeau 1 A. Maignan 1 
2 LaMIPS - Laboratoire de Microélectronique et de Physique des Semiconducteurs
CRISMAT - Laboratoire de cristallographie et sciences des matériaux, NXP Semiconductors [France], Presto Engineering Europe
Abstract : The promising thermoelectric material TiS2 can be easily chemically doped and intercalated. We present here studies of single crystals that are intercalated with excess Ti or Co, or substituted with Ta. We demonstrate the intrinsic impact of these dopants on the thermal transport in the absence of grain boundary scattering. We show that Ta doping has the greatest impact on the thermal scattering rate per ion added, leading to a five-fold reduction in the lattice thermal conductivity as compared to stoichiometric single crystals. © 2015 AIP Publishing LLC.
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Submitted on : Monday, July 15, 2019 - 6:05:36 PM
Last modification on : Saturday, June 25, 2022 - 9:53:41 AM

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R. Daou, H. Takahashi, S. Hébert, M. Beaumale, E. Guilmeau, et al.. Intrinsic effects of substitution and intercalation on thermal transport in two-dimensional TiS2 single crystals. Journal of Applied Physics, American Institute of Physics, 2015, 117 (16), pp.165101. ⟨10.1063/1.4919078⟩. ⟨hal-02184145⟩

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