Orbitally driven giant phonon anharmonicity in SnSe
2015年10月19日 · From inelastic neutron scattering measurements and first-principles simulations, we mapped the four-dimensional phonon dispersion surfaces of SnSe, and found …
Extended anharmonic collapse of phonon dispersions in SnS and SnSe - Nature
2020年9月4日 · Using high-resolution inelastic neutron scattering (INS) on single-crystals, we chart the evolution of phonons in SnS from 150 K to 1050 K and clearly reveal the soft-mode …
Phonon anharmonicity in single-crystalline SnSe
2018年12月28日 · Analysis of the Raman peak frequencies and linewidths revealed phonon decay to be dominated by a three-phonon scattering process. Consistent with this observation, …
The curious case of the structural phase transition in SnSe
2023年6月3日 · Enhanced phonon scattering decreases the lattice heat conductivity so that the power factor in SnSe reaches its highest value at temperatures near the phase transition (ZT …
Phase transition and anharmonicity in SnSe - ScienceDirect
2019年8月1日 · Our recent inelastic neutron scattering (INS) measurements have shown that the ultralow thermal conductivity of SnSe arises from strongly anharmonic phonons near a lattice …
Adjustment in phonon scattering through doping to boosting …
2024年8月1日 · The abundance of phonon scattering in SnSe can be attributed to several key factors: the inherent instability of the electronic structure, the lattice instability caused by orbital …
High-temperature phonon transport properties of SnSe from …
2021年7月29日 · One possible explanation is that higher-order phonon–phonon scatterings beyond three-phonons may play a crucial role in the phonon transport of SnSe. Among these …
Phonon anharmonicity and negative thermal expansion in SnSe
2016年8月9日 · Using inelastic neutron scattering (INS) and nuclear resonant inelastic X-ray scattering (NRIXS), we have measured the phonon dispersions and density of states (DOS) …
Four-Phonon Scattering Effect and Two-Channel Thermal …
2022年2月22日 · In this work, we study four-phonon scattering and diffusion transport in two-dimensional (2D) thermoelectric materials using the paraelectric phase of 2D SnSe as an …
Band flattening and phonon-defect scattering in cubic SnSe…
2021年1月1日 · Rock-salt SnSe-AgSbTe 2 alloy is synthesized. AgSbTe 2 alloying introduces band flattening and multiple defect-phonon scattering. A ZTmax of 1.0 at 820 K and a ZTave …