کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5363873 | 1503697 | 2013 | 6 صفحه PDF | دانلود رایگان |
Using quantum mechanics GASTEP software package based on the first principle density function theory (DFT), the electronic structure and optical properties of Ga0.5Al0.5As(1 0 0) β2(2 Ã 4) reconstruction surface are calculated. Result shows that Ga0.5Al0.5As(1 0 0) β2(2 Ã 4) reconstruction surface is stable. The calculated work function of Ga0.5Al0.5As(1 0 0) β2(2 Ã 4) reconstruction surface is 4.811 eV. The band gap of the surface is smaller than the bulk. During the formation of the surface, the electrons move into the bulk and a band-binding region is formed. The absorption peaks move to the high-energy edge and the reflectivity decreases, the static dielectric constant decreases, metal reflective properties region of the surface moves to the low-energy edge and is smaller than the bulk.
⺠The build of Ga0.5Al0.5As(1 0 0) β2(2 Ã 4) reconstruction surface. ⺠The analysis of the photoelectric emission properties of the surface. ⺠The comparison of the optical properties of the surface and the bulk.
Journal: Applied Surface Science - Volume 266, 1 February 2013, Pages 380-385