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

–

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