Reinvestigation of the thermal properties of single-crystalline SnSe - Archive ouverte HAL Access content directly
Journal Articles Applied Physics Letters Year : 2017

Reinvestigation of the thermal properties of single-crystalline SnSe

Abstract

The simple binary SnSe has been recently proposed as a prospective candidate for thermoelectric applications due to its exceptionally low lattice thermal conductivity. However, the thermal transport in single crystals was found to be significantly lower than in polycrystalline samples despite the presence of grain boundary scattering in the latter. In order to better understand the origin of this issue, we report here on a detailed characterization of the thermoelectric properties of a vertical-Bridgman-grown single-crystal of SnSe along the a, b, and c crystallographic axes in a wide range of temperatures (5–700 K). We find that the thermal conductivity features a pronounced Umklapp peak near 12 K whose magnitude depends on the crystal orientation. Unlike prior reports, our results evidence a significant anisotropy between the a, b, and c directions with lattice thermal conductivity values reaching 1.2, 2.3, and 1.7 Wm-1 K-1 at 300K respectively. While the fundamental reasons behind these differences remain unclear, our results indicate that the intrinsic lattice thermal conductivity of single-crystalline SnSe is likely significantly higher than previously thought.
Fichier principal
Vignette du fichier
2016_APL_Dora.pdf (1.9 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-03969693 , version 1 (02-02-2023)

Identifiers

Cite

Dorra Ibrahim, Jean-Baptiste Vaney, Selma Sassi, Christophe Candolfi, Viktoriia Ohorodniichuk, et al.. Reinvestigation of the thermal properties of single-crystalline SnSe. Applied Physics Letters, 2017, 110 (3), pp.032103. ⟨10.1063/1.4974348⟩. ⟨hal-03969693⟩
8 View
7 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More