Crystal growth, and high thermal conductivity in cubic zinc-blende BAs and BP

ORAL

Abstract

The zinc blende cubic BAs and BP, due to their potential ultra-high thermal conductivity (k) calculated through first principle approach, have attracted significant research efforts in the past few years. In order to experimentally verify the predicted high k values, high quality defect-free single crystal growth is needed to eliminate phonon scattering caused by defects such as deficiency, anti-site defects, voids, impurities, twin/grain boundaries. Herein, we have carried out systematical studies to: 1) find out the suitable crystal growth techniques for BAs and BP despite many challenges; 2) investigate the growth mechanism to optimize the crystal growth; and 3) grow large size of BAs and BP crystals up to 1.5 mm size where a high k up to 600 W/m/K is obtained in BP crystals from time-domain thermoreflectance (TDTR) measurements. The obtained k value is much higher than that of well-known AlN (~400 W/m/K), and is only smaller than that of C-based diamond and nanotube/graphene

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Presenters

  • Sheng Li

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

Authors

  • Sheng Li

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

  • Xiaoyuan Liu

    • Univ of Texas, Dallas

  • Qiye Zheng

    • University of Illinois at Urbana-Champaign

  • Bai Song

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

  • Gang Chen

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

  • David Cahill

    • Materials Science and Engineering, University of Illinois at Urbana-Champaign
    • Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign
    • University of Illinois at Urbana-Campaign
    • University of Illinois at Urbana-Champaign
    • University of Illinois at Urbana–Champaign
    • Department of Materials Science and Engineering and Materials Research Laboratory, Univ of Illinois - Urbana
    • Univ of Illinois - Urbana
    • Univ of Illinois at Urbana-Champaign
    • Department of Materials Science and Engineering, University of Illinois

  • 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