时间：2025年5月23日（周五） 10:00-11:30

Time: 10:00-11:30, Friday, May 23, 2025

地点：西湖大学云谷校区E10-306

Venue: E10-306, Yungu Campus

主持人: 西湖大学工学院 李文彬 博士

Host: Dr. Wenbin Li, Assistant Professor, Westlake University

语言：英文

Language: English

主讲嘉宾/Speaker：

Prof. Wu Li李武

Associate Professor

Eastern Institute of Technology, Ningbo

主讲人简介/Biography:

Dr. Wu Li is a tenured associate professor at Eastern Institute of Technology, Ningbo. He received his BSc from Zhengzhou University in 2006 and PhD from Institute of Physics, Chinese Academy of Sciences in 2011. During his PhD, he studied in TU Dresden, Germany for two years (2008-2010). He did postdocs at CEA, France (2011-2013) and SCM, Netherlands as a Marie Curie fellow (2013-2015). After that he returned to CEA as a research scientist in 2015. From 2016 to 2023, he served as Assistant and Associate Professor in the Institute for Advanced Study, Shenzhen University. He is a primary developer of the ShengBTE software, routinely used for studying the lattice thermal conductivity. He has been ranked among the World's Top 2% Scientists (2021-2024) by citation for “the career long impact”.

讲座摘要/Abstract:

It is conventionally believed that the contribution of phonons to thermal conductivity in metals is negligible. However, through first-principles calculations, we have revealed some exceptions: (1) Beryllium (Be) exhibits the highest phonon thermal conductivity among all elemental metals, reaching 125 W/m·K, surpassing the contribution of electrons [1]; (2) Tungsten (W) has a phonon thermal conductivity of 46 W/m·K, accounting for 30% of its total thermal conductivity [2]. These anomalously high phonon thermal conductivities are attributed to weak anharmonic interactions, which are closely related to the Debye temperature, crystal structure, or atomic bonding. Weak anharmonic interactions can also lead to electron-dominated phonon scattering, characterized by a weak temperature dependence of phonon thermal conductivity [2, 3]. Furthermore, electron-phonon coupling also causes the thermal conductivity of semimetal TaN to exhibit an anomalous non-monotonic pressure dependence [4].

[1] Chen, Pang, Meng, and Li, PRB 109, L220302(2024)

[2] Chen, Ma and Li, PRB 99, 020305(R) (2019)

[3] C. Li, N. K. Ravichandran, L. Lindsay, and D. Broido, PRL 121, 175901 (2018)

[4] Kundu, Chen, Yang, Meng, Carrete, Kabir, Madsen, and Li, PRL 132, 116301 (2024)

讲座联系人/Contact:

工学院朱云云

zhuyunyun@westlake.edu.cn