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

Bing Lv, Yucheng Lan, Xiqu Wang, Qian Zhang, Yongjie Hu, Allan J. Jacobson, David Broido, Gang Chen, Zhifeng Ren, Ching Wu Chu

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37 Citations (Scopus)

Abstract

Recent calculations predict a super-thermal-conductivity of ∼2000 Wm-1 K-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-1 K-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.

Original languageEnglish
Article number074105
JournalApplied Physics Letters
Volume106
Issue number7
DOIs
Publication statusPublished - 2015 Feb 16

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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