Anharmonic Phonon Coupling in Single-Crystal Semiconducting and Metal-Like van der Waals In2Se3

We study the anharmonic phonon interactions in the single-crystal semiconducting (α) and metal-like (β) van der Waals In2Se3 layers, through the determination and analysis of temperature-dependent Raman spectra and thermal conductivities, supported by first-principles calculations of phonon band str...

Full description

Saved in:
Bibliographic Details
Published inJournal of physical chemistry. C Vol. 122; no. 40; pp. 22849 - 22855
Main Authors Igo, John, Zhou, Shengwen, Yu, Zhi-Gang, Amnuayphol, Oliver Peter, Zhao, Feng, Gu, Yi
Format Journal Article
LanguageEnglish
Published American Chemical Society 11.10.2018
Online AccessGet full text

Cover

More Information
Summary:We study the anharmonic phonon interactions in the single-crystal semiconducting (α) and metal-like (β) van der Waals In2Se3 layers, through the determination and analysis of temperature-dependent Raman spectra and thermal conductivities, supported by first-principles calculations of phonon band structures. Our results indicate strong lattice anharmonicity in β-In2Se3 giving rise to significant phonon peak broadening and a suppressed lattice thermal conductivity and reveal that the anharmonic phonon interactions are the main thermal transport-limiting mechanism in both phases. The low thermal conductivity combined with a large electrical conductivity makes the metal-like β-In2Se3 a potential efficient thermoelectric material.
ISSN:1932-7447
1932-7455
DOI:10.1021/acs.jpcc.8b06247