Seeded Growth and Characterization of Boron Arsenide Single Crystals with High Thermal Conductivity

ORAL

Abstract

With the rapid miniaturization of modern microelectronic devices, the need for materials with high thermal conductivity for passive cooling is continuously growing. Recently, zinc-blende boron arsenide (BAs) has emerged with a surprisingly high lattice thermal conductivity of over 2000 W m-1 K-1 at room temperature as predicted by first-principles calculations, which makes it a potential competitor for diamond that holds the highest thermal conductivity to date. However, due to the extremely challenging difficulties in the preparation of high quality single crystals, experimental demonstration has not been obtained. Here, we report synthesis of BAs crystals (0.4 ~ 0.6 mm) via a seeded chemical vapor transport method. The measured thermal conductivity, at least 341 W m-1 K-1 at room temperature, is not as high as predicted, but is highest among reported values and comparable to that of popular high thermal conductivity materials like copper and aluminum nitride. Further improvement seems very possible along this direction.

*The work is funded by the Office of Naval Research under a MURI grant N00014-16-1-2436.

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Presenters

  • Fei Tian

    • Department of Physics and the Texas Center for Superconductivity, University of Houston
    • Department of Physics and Texas Center for Superconductivity at University of Houston

Authors

  • Fei Tian

    • Department of Physics and the Texas Center for Superconductivity, University of Houston
    • Department of Physics and Texas Center for Superconductivity at University of Houston

  • Bai Song

    • Massachusetts Inst of Tech-MIT
    • Department of Mechanical Engineering, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology

  • Bing Lv

    • University of Texas at Dallas
    • Department of Physics, University of Texas at Dallas
    • Univ of Texas, Dallas
    • Dept. of Physics, The University of Texas at Dallas
    • Department of Physcis, University of Texas at Dallas

  • Jingying Sun

    • Texas Center for Superconductivity
    • Department of Physics and Texas Center for Superconductivity, University of Houston
    • Department of Physics and the Texas Center for Superconductivity, University of Houston
    • Department of Physics and Texas Center for Superconductivity at University of Houston

  • Shuyuan Huyan

    • Texas Center for Superconductivity
    • Department of Physics and Texas Center for Superconductivity, University of Houston
    • Department of Physics and the Texas Center for Superconductivity, University of Houston
    • Department of Physics and Texas Center for Superconductivity at University of Houston

  • Qi Wu

    • Department of Physics and the Texas Center for Superconductivity, University of Houston

  • Jun Mao

    • Department of Mechanical Engineering, University of Houston

  • Yizhou Ni

    • Department of Physics and the Texas Center for Superconductivity, University of Houston
    • Department of Physics and Texas Center for Superconductivity at University of Houston
    • Department of Physics and Texas Center for Superconductivity, University of Houston
    • Univ of Houston

  • Zhiwei Ding

    • Massachusetts Inst of Tech-MIT
    • Department of Mechanical Engineering, Massachusetts Institute of Technology

  • Samuel Huberman

    • Department of Mechanical Engineering, Massachusetts Institute of Technology

  • Te-Huan Liu

    • Massachusetts Inst of Tech-MIT
    • Department of Mechanical Engineering, Massachusetts Institute of Technology

  • Gang Chen

    • Massachusetts Inst of Tech-MIT
    • Department of Mechanical Engineering, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology

  • Shuo Chen

    • Department of Physics and TcSUH, University of Houston
    • Texas Center for Superconductivity
    • Department of Physics and Texas Center for Superconductivity, University of Houston
    • Department of Physics and the Texas Center for Superconductivity, University of Houston
    • Department of Physics and Texas Center for Superconductivity at University of Houston
    • Univ of Houston

  • Paul Chu

    • Texas Center for Superconductivity
    • Department of Physics and Texas Center for Superconductivity, University of Houston
    • Department of Physics and the Texas Center for Superconductivity, University of Houston
    • Department of Physics and Texas Center for Superconductivity at University of Houston

  • Zhifeng Ren

    • University of Houston
    • Department of Physics and the Texas Center for Superconductivity, University of Houston