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.
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16 February 2015
Research Article|
February 20 2015
Experimental study of the proposed super-thermal-conductor: BAs
Bing Lv;
Bing Lv
1Department of Physics and Texas Center for Superconductivity,
University of Houston
, Houston, Texas 77204-5002, USA
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Yucheng Lan;
Yucheng Lan
1Department of Physics and Texas Center for Superconductivity,
University of Houston
, Houston, Texas 77204-5002, USA
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Xiqu Wang;
Xiqu Wang
2Department of Chemistry and Texas Center for Superconductivity,
University of Houston
, Houston, Texas 77204-5003, USA
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Qian Zhang;
Qian Zhang
1Department of Physics and Texas Center for Superconductivity,
University of Houston
, Houston, Texas 77204-5002, USA
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Yongjie Hu;
Yongjie Hu
3Department of Mechanical Engineering,
Massachusetts Institute of Technology
, Cambridge, Massachusetts 02139, USA
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Allan J. Jacobson;
Allan J. Jacobson
2Department of Chemistry and Texas Center for Superconductivity,
University of Houston
, Houston, Texas 77204-5003, USA
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David Broido;
David Broido
4Department of Physics,
Boston College
, Chestnut Hill, Massachusetts 02467, USA
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Gang Chen;
Gang Chen
3Department of Mechanical Engineering,
Massachusetts Institute of Technology
, Cambridge, Massachusetts 02139, USA
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Zhifeng Ren;
Zhifeng Ren
a)
1Department of Physics and Texas Center for Superconductivity,
University of Houston
, Houston, Texas 77204-5002, USA
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Ching-Wu Chu
Ching-Wu Chu
a)
1Department of Physics and Texas Center for Superconductivity,
University of Houston
, Houston, Texas 77204-5002, USA
5
Lawrence Berkeley National Laboratory
, Berkeley California 94720, USA
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a)
Electronic addresses: zren@uh.edu and cwchu@uh.edu
Appl. Phys. Lett. 106, 074105 (2015)
Article history
Received:
January 21 2015
Accepted:
February 11 2015
Citation
Bing Lv, Yucheng Lan, Xiqu Wang, Qian Zhang, Yongjie Hu, Allan J. Jacobson, David Broido, Gang Chen, Zhifeng Ren, Ching-Wu Chu; Experimental study of the proposed super-thermal-conductor: BAs. Appl. Phys. Lett. 16 February 2015; 106 (7): 074105. https://doi.org/10.1063/1.4913441
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