کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9829856 | 1524499 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal properties of GaN/Si heterostructures grown by molecular beam epitaxy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
GaN/Si heterostructures were prepared by molecular beam epitaxy employing different Si substrate nitridation times from 0 to 60 min. The GaN/Si structural properties were evaluated by transmission electron microscopy, X-ray diffraction, and atomic force microscopy. Thermal properties of the GaN/Si heterostructures were studied by the photoacoustic technique. Employing a two-layer model the interfacial thermal conductivity (η) was obtained as a function of the nitridation time. η presented low values of around 150 W/cm2 K in samples with poor structural characteristics. We obtained the maximum value of η=255W/cm2K for the sample prepared with the optimal nitridation time. The variation of the parameter η for different nitridation times can be associated to interface phonon scattering process by the presence of disorder at the GaN/Si interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 278, Issues 1â4, 1 May 2005, Pages 415-420
Journal: Journal of Crystal Growth - Volume 278, Issues 1â4, 1 May 2005, Pages 415-420
نویسندگان
M. Cervantes-Contreras, C.A. Quezada-Maya, M. López-López, G. González de la Cruz, M. Tamura, T. Yodo,