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Experimental observation of localized interfacial phonon modes

Author

Listed:
  • Zhe Cheng

    (George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology
    University of Illinois at Urbana-Champaign)

  • Ruiyang Li

    (University of Notre Dame)

  • Xingxu Yan

    (University of California
    University of California)

  • Glenn Jernigan

    (U.S. Naval Research Laboratory)

  • Jingjing Shi

    (George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology)

  • Michael E. Liao

    (University of California, Los Angeles)

  • Nicholas J. Hines

    (George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology)

  • Chaitanya A. Gadre

    (University of California)

  • Juan Carlos Idrobo

    (Oak Ridge National Laboratory)

  • Eungkyu Lee

    (Kyung Hee University)

  • Karl D. Hobart

    (U.S. Naval Research Laboratory)

  • Mark S. Goorsky

    (University of California, Los Angeles)

  • Xiaoqing Pan

    (University of California
    University of California
    University of California)

  • Tengfei Luo

    (University of Notre Dame)

  • Samuel Graham

    (George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology)

Abstract

Interfaces impede heat flow in micro/nanostructured systems. Conventional theories for interfacial thermal transport were derived based on bulk phonon properties of the materials making up the interface without explicitly considering the atomistic interfacial details, which are found critical to correctly describing thermal boundary conductance. Recent theoretical studies predicted the existence of localized phonon modes at the interface which can play an important role in understanding interfacial thermal transport. However, experimental validation is still lacking. Through a combination of Raman spectroscopy and high-energy-resolution electron energy-loss spectroscopy in a scanning transmission electron microscope, we report the experimental observation of localized interfacial phonon modes at ~12 THz at a high-quality epitaxial Si-Ge interface. These modes are further confirmed using molecular dynamics simulations with a high-fidelity neural network interatomic potential, which also yield thermal boundary conductance agreeing well with that measured in time-domain thermoreflectance experiments. Simulations find that the interfacial phonon modes have an obvious contribution to the total thermal boundary conductance. Our findings significantly contribute to the understanding of interfacial thermal transport physics and have impact on engineering thermal boundary conductance at interfaces in applications such as electronics thermal management and thermoelectric energy conversion.

Suggested Citation

  • Zhe Cheng & Ruiyang Li & Xingxu Yan & Glenn Jernigan & Jingjing Shi & Michael E. Liao & Nicholas J. Hines & Chaitanya A. Gadre & Juan Carlos Idrobo & Eungkyu Lee & Karl D. Hobart & Mark S. Goorsky & X, 2021. "Experimental observation of localized interfacial phonon modes," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-27250-3
    DOI: 10.1038/s41467-021-27250-3
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    References listed on IDEAS

    as
    1. Ondrej L. Krivanek & Tracy C. Lovejoy & Niklas Dellby & Toshihiro Aoki & R. W. Carpenter & Peter Rez & Emmanuel Soignard & Jiangtao Zhu & Philip E. Batson & Maureen J. Lagos & Ray F. Egerton & Peter A, 2014. "Vibrational spectroscopy in the electron microscope," Nature, Nature, vol. 514(7521), pages 209-212, October.
    2. Xingxu Yan & Chengyan Liu & Chaitanya A. Gadre & Lei Gu & Toshihiro Aoki & Tracy C. Lovejoy & Niklas Dellby & Ondrej L. Krivanek & Darrell G. Schlom & Ruqian Wu & Xiaoqing Pan, 2021. "Single-defect phonons imaged by electron microscopy," Nature, Nature, vol. 589(7840), pages 65-69, January.
    3. Maureen J. Lagos & Andreas Trügler & Ulrich Hohenester & Philip E. Batson, 2017. "Mapping vibrational surface and bulk modes in a single nanocube," Nature, Nature, vol. 543(7646), pages 529-532, March.
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    Cited by:

    1. Ruochen Shi & Qize Li & Xiaofeng Xu & Bo Han & Ruixue Zhu & Fachen Liu & Ruishi Qi & Xiaowen Zhang & Jinlong Du & Ji Chen & Dapeng Yu & Xuetao Zhu & Jiandong Guo & Peng Gao, 2024. "Atomic-scale observation of localized phonons at FeSe/SrTiO3 interface," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    2. Zhe Cheng & Jianbo Liang & Keisuke Kawamura & Hao Zhou & Hidetoshi Asamura & Hiroki Uratani & Janak Tiwari & Samuel Graham & Yutaka Ohno & Yasuyoshi Nagai & Tianli Feng & Naoteru Shigekawa & David G. , 2022. "High thermal conductivity in wafer-scale cubic silicon carbide crystals," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    3. Ning Li & Ruochen Shi & Yifei Li & Ruishi Qi & Fachen Liu & Xiaowen Zhang & Zhetong Liu & Yuehui Li & Xiangdong Guo & Kaihui Liu & Ying Jiang & Xin-Zheng Li & Ji Chen & Lei Liu & En-Ge Wang & Peng Gao, 2023. "Phonon transition across an isotopic interface," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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