High thermal conductivity in cubic boron arsenide crystals

ORAL

Abstract

We report our experimental efforts on the high thermal conductivity above 1000 W/m/K in the zinc blende cubic BAs crystals. First principle calculations have predicted the thermal conductivity of BAs, is second only to that of diamond at room temperature, which may constitute a useful thermal management material for high–power density electronic devices. Herein, we reported our experimental efforts to grow single domain, defect-free, and large size BAs crystals, evidenced by both single crystal diffraction and scanning transmission electron microscopy (STEM) studies, through test and optimization various single-crystal growth methods. Furthermore, the time-domain thermoreflectance (TDTR) measurement of the BAs crystal gives a high thermal conductivity ~1000 W/m K which is consistent with the predicated value based on four phonon calculations, representing BAs as a new class of ultrahigh thermal conductivity materials.

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Presenters

  • Sheng Li

    Department of physics, University of Texas at Dallas, Physics, University of Texas at Dallas, University of Texas at Dallas

Authors

  • Sheng Li

    Department of physics, University of Texas at Dallas, Physics, University of Texas at Dallas, University of Texas at Dallas

  • Qiye Zheng

    Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign

  • Yinchuan Lv

    Department of Physics, University of Illinois at Urbana-Champaign

  • Xiaoyuan Liu

    Department of physics, University of Texas at Dallas, University of Texas at Dallas

  • Xiqu Wang

    Department of Chemistry, University of Houston

  • Pinshane Huang

    Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Materials Science and Engineering, University of Illinois Urbana-Champaign, Department of Material Science and Engineering, University of Illinois at Urbana-Champaign

  • David G Cahill

    Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, University of Illinois at Urbana-Champaign

  • Bing Lv

    Department of physics, University of Texas at Dallas, Physics, University of Texas at Dallas, University of Texas at Dallas