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Raman scattering detection of stacking faults in free-standing cubic-SiC epilayer

Author:
Liu Xing-Fang  Sun Guo-Sheng  Li Jin-Min  Zhao Yong-Mei  Li Jia-Ye  Wang Lei  Zhao Wan-Shun  Zeng Yi-Ping  


Journal:
CHINESE PHYSICS LETTERS


Issue Date:
2006


Abstract(summary):

We report on stacking fault (SF) detection in free-standing cubic-SiC epilayer by the Raman measurements. The epilayer with enhanced SFs is heteroepitaxially grown by low pressure chemical vapour deposition on a Si(100) substrate and is released in KOH solution by micromechanical manufacture, on which the Raman measurements are performed in a back scattering geometry. The TO line of the Raman spectra is considerably broadened and distorted. We discuss the influence of SFs on the intensity profiles of TO mode by comparing our experimental data with the simulated results based on the Raman bond polarizability (BP) model in the framework of linear-chain concept. Good agreement with respect to the linewidth and disorder-induced peak shift is found by assuming the mean distance of the SFs to be 11 angstrom in the BP model.


Page:
2834---2837


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