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Title: Experimental study of the proposed super-thermal-conductor: BAs

Recent calculations predict a super-thermal-conductivity of ∼2000 Wm{sup −1} K{sup −1}, comparable to that of diamond, in cubic boron arsenide (BAs) crystals, which may offer inexpensive insulators with super-thermal-conductivity for microelectronic device applications. We have synthesized and characterized single crystals of BAs with a zinc blende cubic structure and lattice parameters of a = 4.7830(7) Å. A relatively high thermal conductivity of ∼200 Wm{sup −1} K{sup −1} is obtained, close to those of best non-carbon crystal insulators, such as SiC, although still an order of magnitude smaller than the value predicted. Based on our XPS, X-ray single crystal diffraction, and Raman scattering results, steps to achieve the predicted super-thermal conductivity in BAs are proposed.
Authors:
; ; ;  [1] ; ;  [2] ; ;  [3] ;  [4] ;  [1] ;  [5]
  1. Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5002 (United States)
  2. Department of Chemistry and Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5003 (United States)
  3. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
  4. Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467 (United States)
  5. (United States)
Publication Date:
OSTI Identifier:
22412673
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 7; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BORON ARSENIDES; COMPARATIVE EVALUATIONS; CUBIC LATTICES; DIAMONDS; LATTICE PARAMETERS; MONOCRYSTALS; RAMAN SPECTROSCOPY; SILICON CARBIDES; THERMAL CONDUCTIVITY; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY; ZINC SULFIDES