Time-domain Thermoreflectance
We use time-domain thermoreflectance (TDTR) to measure thermal conductivity and interface thermal conductance.
Inelastic phonon transport across interfaces
Nature Communications, Aug 2022
Understanding thermal transport across metal/semiconductor interfaces is crucial for the heat dissipation of electronics. The dominant heat carriers in non-metals, phonons, are thought to transport elastically across most interfaces, except for a few extreme cases.... [Read More]
Ultralow and glass-like thermal conductivity in BaTiS3 single crystal
Nature Communications, Nov 2020
Ultralow and glass-like thermal conductivity in a hexagonal perovskite chalcogenide single crystal, BaTiS3, is observed. A two-level atomic tunneling system exists in a shallow double-well potential of the Ti atom and is of sufficiently high frequency to scatter heat-carrying phonons up to room temperature.... [Read More]
Dislocation induced thermal transport anisotropy in III-V semiconductors
Nature Materials, Jan 2019
Dislocations, one-dimensional lattice imperfections, are common to technologically important materials such as III–V semiconductors, and adversely affect heat dissipation in, for example, nitride-based high-power electronic devices.... [Read More]
Selected Publications
| Qinshu Li, Fang Liu, Song Hu, Xiaokun Gu, Xinqiang Wang, Bo Sun et al. "Inelastic phonon transport across atomically sharp metal/semiconductor interfaces." Nature Communications, 13, 4901, 2022. |
| Bo Sun, Shanyuan Niu, Raphael P Hermann, Michael E Manley, Jayakanth Ravichandran, Austin J Minnich et al. "High frequency atomic tunneling yields ultralow and glass-like thermal conductivity in chalcogenide single crystals." Nature Communications, 11, 6039, 2020. |
| Bo Sun, Georg Haunschild, Carlos Polanco, James Ju, Lucas Lindsay, Gregor Koblmüller, Yee Kan Koh, "Dislocation-induced thermal transport anisotropy in single-crystal group-III nitride films." Nature Materials, 18, 136, 2019. |
Recent News [More News]
# We have a few fully funded Postdoctoral, PhD, and Master positions. Please feel free to contact Bo directly.
Sep 2023: Xinfu, Xin, Xiangtian and Jingjing joined us!
June 2023: The group attend WTT 2023 in Xi'an!
Sep 2022: Yufeng and Shasha now are PhD candidates!
Aug 2022: Qinshu and Fang's work has been published in Nature Communications! Congratulations to them!
July 2022: Lu successfully defended her PhD dissertation! Congratulations to Dr. Zhao!
May 2022: We have set up the 2nd TDTR in our new lab!
Apr 2022: Doudou, Yizhe and Qinshu successfully passed their qualify exam!
Dec 2021: Qinshu presents her work in MRS Fall and wins the best student presentation award! Congratulations!
Sep 2021: Rongjie joined us, welcome!
Sep 2021: Songrui left for UC Riverside. All the best!
Aug 2021: We have finshed setting up our new lab at the Energy & Environment Building.
Jan 2021: Our work on atomic tunneling induced ultralow and glass-like heat conduction in BaTiS3 is covered in Science Daily, phys.org, and Chemistry World.
Sep 2020: Yizhe, Qinshu and Shasha joined us!
July 2020: Doudou joined us!
Sep 2019: Yufeng joined the group as my first master student!
Apr 2019: Bo officially joined Tsinghua SIGS as an assistant professor.
Dec 2018: Our first TDTR setup is fully operational at the Energy & Environment Building.
