Ojo, O.
, Gunatilleke, W.
, Biacchi, A.
, Wang, H.
and Nolas, G.
(2025),
Thermal properties and ultra-low thermal conductivity of Zn2GeSe4, Dalton Transactions, [online], https://doi.org/10.1039/D5DT00033E, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=959505
(Accessed April 19, 2025)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Thermal properties and ultra-low thermal conductivity of Zn2GeSe4
Published
Author(s)
Oluwagbemiga Ojo, Wilarachchige Gunatilleke, , Hsin Wang, George Nolas
Abstract
Materials-related discovery continues to drive advancements in technologically significant fields of interest. Moreover, an understanding of the thermal properties of materials is essential for any application of interest. Here, we report on the structural, optical, and thermal properties of Zn2GeSe4, which forms in the sphalerite crystal structure with an indirect 1.85 eV band gap, as obtained from our optical spectroscopy measurements. Analyses and modeling of the temperature-dependent thermal properties reveal a low speed of sound and Debye temperature, with ultra-low thermal conductivity over a large temperature range due to low-frequency soft modes as well as strong lattice anharmonicity. Our findings are presented and discussed in the context of the current intense interest in metal chalcogenides and will facilitate the development of these and similar materials for applications where low thermal conductivity is of interest.Citation
Dalton Transactions
Volume
54
Issue
15
Pub Type
Journals
Download Paper
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created March 11, 2025, Updated April 18, 2025