کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8039049 | 1518592 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical bandgap and stress variations induced by the formation of latent tracks in GaN under swift heavy ion irradiation
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Optical bandgap and stress variations induced by the formation of latent tracks in GaN under swift heavy ion irradiation Optical bandgap and stress variations induced by the formation of latent tracks in GaN under swift heavy ion irradiation](/preview/png/8039049.png)
چکیده انگلیسی
In this work, GaN epilayers, grown on (0 0 0 1) sapphire substrate, were studied under swift heavy ion irradiation with a broad variety of projectiles at different energies. Several characterization techniques including transmission electron microscopy, optical absorption spectroscopy and Raman scattering spectroscopy, employed for different irradiation conditions, allowed the identification and the attribution of the origin of the observed modifications. It has been established that for projectiles presenting an electronic stopping power higher than a threshold of 17â¯keV.nmâ1, there was the formation of disordered latent tracks on the ion paths. We have shown that these tracks become more continuous and are visible until a higher depth with the increase of the projectile electronic stopping power. We have also highlighted that the latent tracks induce the appearance of a biaxial stress of the order of some GPa and strongly modify the optical bandgap values. Contrary to this effect of electronic energy loss, the atomic displacements generated by nuclear energy loss process did not imply significant biaxial stress and optical bandgap closing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 431, 15 September 2018, Pages 12-18
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 431, 15 September 2018, Pages 12-18
نویسندگان
F. Moisy, M. Sall, C. Grygiel, A. Ribet, E. Balanzat, I. Monnet,