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
| Yufeng Wang, Ripeng Luo, Jian Chen, Xuefeng Zhou, Shanmin Wang, Junqiao Wu, Feiyu Kang, Kuang Yu, and Bo Sun. "Proton collective quantum tunneling induces anomalous thermal conductivity of ice under pressure." Physical Review Letters, 132, 264101, 2024. |
| 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.
Aug 2024: Yili and Mengchuan joined us!
Aug 2024: Yufeng successfully defended his PhD dissertation! Congratulations to Dr. Wang!
June 2024: Yufeng's work on quantum thermal transport published in Physical Review Letters!
May 2024: Doudou passed her PhD denfense! Congratulations to Dr. Gao!
April 2024: Bo presented our work at MRS, Seattle!
Sep 2023: Xinfu, Xin, Xiangtian and Jingjing joined us!
June 2023: The group attend WTT 2023 in Xi'an!
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!
Dec 2021: Qinshu presents her work in MRS Fall and wins the best student presentation award! Congratulations!
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.
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.
