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Anomalous thermal transport under high pressure in boron arsenide

Author

Listed:
  • Suixuan Li

    (University of California, Los Angeles)

  • Zihao Qin

    (University of California, Los Angeles)

  • Huan Wu

    (University of California, Los Angeles)

  • Man Li

    (University of California, Los Angeles)

  • Martin Kunz

    (Lawrence Berkeley National Laboratory)

  • Ahmet Alatas

    (Argonne National Laboratory)

  • Abby Kavner

    (University of California, Los Angeles)

  • Yongjie Hu

    (University of California, Los Angeles)

Abstract

High pressure represents extreme environments and provides opportunities for materials discovery1–8. Thermal transport under high hydrostatic pressure has been investigated for more than 100 years and all measurements of crystals so far have indicated a monotonically increasing lattice thermal conductivity. Here we report in situ thermal transport measurements in the newly discovered semiconductor crystal boron arsenide, and observe an anomalous pressure dependence of the thermal conductivity. We use ultrafast optics, Raman spectroscopy and inelastic X-ray scattering measurements to examine the phonon bandstructure evolution of the optical and acoustic branches, as well as thermal conductivity under varied temperatures and pressures up to 32 gigapascals. Using atomistic theory, we attribute the anomalous high-pressure behaviour to competitive heat conduction channels from interactive high-order anharmonicity physics inherent to the unique phonon bandstructure. Our study verifies ab initio theory calculations and we show that the phonon dynamics—resulting from competing three-phonon and four-phonon scattering processes—are beyond those expected from classical models and seen in common materials. This work uses high-pressure spectroscopy combined with atomistic theory as a powerful approach to probe complex phonon physics and provide fundamental insights for understanding microscopic energy transport in materials of extreme properties.

Suggested Citation

  • Suixuan Li & Zihao Qin & Huan Wu & Man Li & Martin Kunz & Ahmet Alatas & Abby Kavner & Yongjie Hu, 2022. "Anomalous thermal transport under high pressure in boron arsenide," Nature, Nature, vol. 612(7940), pages 459-464, December.
  • Handle: RePEc:nat:nature:v:612:y:2022:i:7940:d:10.1038_s41586-022-05381-x
    DOI: 10.1038/s41586-022-05381-x
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    Cited by:

    1. Wuyang Ren & Wenhua Xue & Shuping Guo & Ran He & Liangzi Deng & Shaowei Song & Andrei Sotnikov & Kornelius Nielsch & Jeroen Brink & Guanhui Gao & Shuo Chen & Yimo Han & Jiang Wu & Ching-Wu Chu & Zhimi, 2023. "Vacancy-mediated anomalous phononic and electronic transport in defective half-Heusler ZrNiBi," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Bin Xu & Yawen Li & Peibin Hong & Peijie Zhang & Jiang Han & Zewen Xiao & Zewei Quan, 2024. "Pressure-controlled free exciton and self-trapped exciton emission in quasi-one-dimensional hybrid lead bromides," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    3. Cheng Hu & Jiajun Chen & Xianliang Zhou & Yufeng Xie & Xinyue Huang & Zhenghan Wu & Saiqun Ma & Zhichun Zhang & Kunqi Xu & Neng Wan & Yueheng Zhang & Qi Liang & Zhiwen Shi, 2024. "Collapse of carbon nanotubes due to local high-pressure from van der Waals encapsulation," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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