By the use of dimethylgermane [(CH3)2GeH2 : DMGe], a Si clean surface can be carbonized reproducibly at as low as 650 °C in a gas source molecular beam epitaxy. The initial stage for heteroepitaxy in the 3C–SiC/Si system has been studied with time resolved in situ reflection high-energy electron diffraction (RHEED) analysis. A RHEED pattern from a carbonized layer indicates single-crystalline 3C–SiC without any 3C–SiC twin spots and Ge-related patterns. An activation energy of about 51.1 kcal/mol is obtained in the initial stage of 3C–SiC growth. The successive growth of 3C–SiC layers formed with DMGe is also discussed.

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