Origins of Twinned Microstructures in B12As2 Epilayers Grown on (0001) 6H-SiC and Their Influence on Physical Properties


The defect structure in B12As2 epitaxial layers grown at two different temperatures on (0001) 6H-SiC by chemical vapor deposition (CVD) was studied using synchrotron white beam x-ray topography (SWBXT) and high resolution transmission electron microscopy (HRTEM). The observed differences in microstructures were correlated with the differences in nucleation at the two growth temperatures. The effect of the difference in microstructure on macroscopic properties of the B12As2 was illustrated using the example of thermal conductivity which was measured using the 3-ω technique. The relationship between the measured thermal conductivity and observed microstructures is discussed.

This is a preview of subscription content, access via your institution.


  1. 1.

    D. Emin, Physics Today, 55, January (1987).

  2. 2.

    D. Emin, J. Sol. Sta. Chem., 179, 2791 (2006).

    CAS  Article  Google Scholar 

  3. 3.

    D. Emin, T. L. Aselage, J. App. Phys., 97, 013529 (2005).

    Article  Google Scholar 

  4. 4.

    D. Emin, J. Sol. Sta. Chem., 177, 1619 (2004).

    CAS  Article  Google Scholar 

  5. 5.

    M. Carrard, D. Emin, L. Zuppiroli, Phys. Rev. B, 51(17), 11270 (1995).

    CAS  Article  Google Scholar 

  6. 6.

    T.L. Aselage and D. Emin, Boron Carbides, in CRC Handbook of Thermoelectrics, D.M. Rowe (Ed.), CRC Press, Boca Raton, (1995).

  7. 7.

    R. Nagarajan, Z. Xu, J. H. Edgar, F. Baig, J. Chaudhuri, Z. Rek, E. A. Payzant, H. M. Meyer, J. Pomeroy and M. Kuball, J. Crystal Growth., 273, 431 (2005).

    CAS  Article  Google Scholar 

  8. 8.

    Cahill and Pohl, Phys. Rev., B 35, 4067 (1987)

    CAS  Article  Google Scholar 

  9. 9.

    Cahill et al., Rhys. Rev., B 50, 6077 (1994)

    CAS  Article  Google Scholar 

  10. 10.

    S. W. Chan, J. Phys. Chem. Solids, 55, 1137 (1994).

    CAS  Article  Google Scholar 

  11. 11.

    C. P. Flynn and J. A. Eades, Thin Solid Films, 389, 116 (2001).

    CAS  Article  Google Scholar 

  12. 12.

    H. Chen, G. Wang, M. Dudley, L. Zhang, L. Wu, Y. Zhu, Z. Xu, J. H. Edgar, and M. Kuball, J. Appl. Phys., 103 (12), 123508 (2008)

    Article  Google Scholar 

  13. 13.

    Hui Chen, Guan Wang, Michael Dudley, Zhou Xu, J. H. Edgar, Tim Batten, Martin Kuball, Lihua Zhang, and Yimei Zhu, Appl. Phys. Lett., 92 (23), 231917 (2008)

    Article  Google Scholar 

  14. 14.

    Roberto Otero, Frauke Hümmelink, Fernando Sato, Sergio B. Legoas, Peter Thostrup, Erik Lægsgaard, Ivan Stensgaard, Douglas S. Galvão and Flemming Besenbacher, Nature Materials, 3, 779 – 782 (2004)

    CAS  Article  Google Scholar 

  15. 15.

    T. Borca-Tasciuc et al., Review of Scientific Instruments, 72, 2139 (2001)

    CAS  Article  Google Scholar 

  16. 16.

    Y. Gong, J. Gary, H. Chen, Yu Zhang, M. Dudley, Yi Zhang, J. Edgar, and M. Kuball, (unpublished).

Download references

Author information



Corresponding author

Correspondence to Yu Zhang.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Zhang, Y., Chen, H., Zhang, N. et al. Origins of Twinned Microstructures in B12As2 Epilayers Grown on (0001) 6H-SiC and Their Influence on Physical Properties. MRS Online Proceedings Library 1164, 910 (2009).

Download citation