Yongheng Li

May 1, 2024 | link.aps.org | Yongheng Li |Jie Chen |Cong Lu

Half-Heusler compounds are promising candidates for thermoelectrics. The exploration of multiphonon interaction, including four-phonon interaction, in half-Heusler compounds contributes to the deep understanding of thermal transport, which is helpful to optimize thermoelectric properties. In this work, LuNiBi is taken as the typical half-Heusler compound to investigate multiphonon interaction and thermal conductivity.

Apr 25, 2024 | link.aps.org | Bin Wei |Henan Polytechnic |Yongheng Li |Wang Li

A comprehensive understanding of phonon transport is essential to develop effective solutions for heat dissipation. Gallium nitride (GaN), a representative of third-generation power semiconductors, has been extensively studied regarding its thermodynamics and lattice dynamics. However, the temperature-dependent phonon properties, especially the anharmonicity at high temperatures, are poorly understood.

Mar 23, 2023 | link.aps.org | Qi Ren |Gang Tang |Yongheng Li |Yingzhuo Lun

Abstract Recently, LaWN3 nitride perovskite with polar symmetry has been synthesized and has shown a large piezoelectric response. In addition to experimentally measured piezoelectricity and theoretically predicted ferroelectricity, the thermal transport properties of LaWN3 remains unexplored.