Abstract
p-type GaN films were grown on a (0001) sapphire substrate by the plasma-assisted molecular beam epitaxy. A low-contamination, high-power efficiency inductively coupled radio frequency plasma source was used, which was developed at the University of Illinois. Using an MBE system equipped with this plasma source, high-quality p-type GaN films were grown without post-growth treatment. X-ray rocking curve measurements for (0002) diffraction showed a full width at half maximum of less than 7 arcmin. The highest room-temperature hole concentration obtained was 1.4×l020 cm−3, and for the same sample, the mobility was 2.5 cm2/V·s. It is believed that the Mott-Anderson transition occurred in this sample resulting in a metallic-type conductivity in the impurity subband. Low-temperature photoluminescence had a blue emission band and no deep-level transitions, indicating the high quality of the grown films. Uniformity of the Mg doping was confirmed by secondary ion mass spectrometry.
Similar content being viewed by others
References
S. Strite and H. Morkoç, J. Vac. Sci. Technol. B 10, 1237 (1992).
H. Morkoç, S. Strite, G.B. Gao, M. E. Lin, B. Sverdlov, and M. Burns, J. Appl. Phys. 76, 1363 (1994).
M. E. Lin, G. Xue, G. L. Zhou, J. E. Greene, and H. Morkoç, Appl. Phys. Lett. 63, 932 (1993).
S. Nakamura, T. Mukai, M. Senoh, and N. Iwasa, Jpn. J. Appl. Phys. 31, L139 (1992).
S. Nakamura, N. Iwasa, M. Senoh, and T. Mukai, Jpn. J. Appl. Phys. 31, 1258 (1992).
H. Amano, M. Kito, K. Hiramatsu, and I. Akasaki, Jpn. J. Appl. Phys. 28, L2112 (1989).
T. D. Moustakas and R. J. Molnar, Mat. Res. Soc. Symp. Proc. 281, 753 (1993).
R. J. Molnar, R. Singh, and T. D. Moustakas, Appl. Phys. Lett. 66, 268 (1995).
Z. Yang, L. K. Li, and W. I. Wang, Appl. Phys. Lett. 67, 1686 (1995).
S. Nakamura, M. Senoh, S. Nagahama, N. Iwasa, T. Yamada, T. Matsushita, H. Kiyoku and Y. Sugimoto, Jpn. J. Appl. Phys. 35, L74 (1996).
O. Gluschenkov et al., manuscript in preparation.
N. F. Mott, Proc. Phys. Soc. A62, 416 (1949); Metal-Insulator Transition (Taylor & Francis, London, 1990), pp. 145–169.
P. W. Anderson, Phys. Rev. 109, 1492 (1958).
B. I. Shklovskii and A. L. Efros, Electronic Properties of Doped Semiconductors, Springer Series in Solid-State Sciences 45, (1984).
J. I. Pankove, Optical Processes in Semiconductors (Prentice-Hall, New Jersey, 1971), pp. 132–139.
Acknowledgments
This work was supported by Samsung Electronics Co. Ltd.. The authors would like to thank Dr. S. Kim and Prof. S.G. Bishop for the photoluminescence measurements and valuable discussions.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Myoung, J., Kim, C., Shim, K. et al. High Quality P-Type GaN Films Grown by Plasma-Assisted Molecular Beam Epitaxy. MRS Online Proceedings Library 423, 385–390 (1996). https://doi.org/10.1557/PROC-423-385
Published:
Issue Date:
DOI: https://doi.org/10.1557/PROC-423-385