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Large Lattice Thermal Conductivity in Several Metals and Semimetals
Speaker Prof. Wu Li, Shenzhen University
Date 2 May 2023 (Tuesday)
Time 14:00 - 15:30
Venue Mr and Mrs Lee Siu Lun Lecture Theater (Lecture Theatre K), HKUST (Lifts 31-32)

It is conventionally thought that around and above room temperature the lattice thermal conductivity (kph) in metals is negligible. Recently anomalously weak anharmonic scattering has been revealed in certain metals including tungsten [1] and transition metal carbides (TMCs)[2,3], leading to large and nearly temperature-independent kph. These behaviors have the origin in either the crystal structure[4] or the electronic structure[3]. From the relation between the phonon transport and the electronic structure in the TMCs we identified a high thermal conductivity material q-TaN[5] with a room temperature value of ~1000W/m-K. We have also quantified the lattice and electronic thermal conductivities of arsenic, We find that the kph of As exhibits strong anisotropy, and the calculated room temperature kph reaches as high as 19 W/m-K along the binary direction, larger than those reported for most of other elemental metals.


[1] Y. Chen, J. Ma and W. Li, PRB 99, 020305(R) (2019)
[2] C. Li, N. K. Ravichandran, L. Lindsay, and D. Broido, PRL 121, 175901 (2018)
[3] A. Kundu, J. Ma, J. Carrete, G. K. H. Madsen and W. Li, Mater. Today Phys. 13, 100214 (2020)
[4] Y. Chen, J. Ma, S. Wen and W. Li, npj Comput. Mater. 5, 98 (2019)
[5] Kundu, Yang, Ma, Ruan, Feng, Carrete, Madsen, and Li, PRL 126, 115901 (2021)


Since 2016, Dr. Li has been an Assistant and Associate Professor at Institute for Advanced Study, Shenzhen University. 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 Dresdent, Germany with a Max-Planck Society Scholarship 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. He is a primary developer of the ShengBTE software, routinely used for studying the lattice thermal conductivity. He has published more than 40 first-author and corresponding-author papers with over 6000 citations (Google Scholar). He has been ranked among the World's Top 2% Scientists (2021 and 2022) by citation for “the career long impact”.

Please contact phweb@ust.hk should you have questions about the talk.