کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1544583 | 1512893 | 2014 | 6 صفحه PDF | دانلود رایگان |

• Nearly straight C chains lead to a transverse contraction of the ribbon width.
• Double C chains decorated ZSiNRs are always metallic.
• Defect states contributed from double C chains across the Fermi level.
• Perfect and double C chains decorated ZSiNRs have FM and AFM ground states respectively.
Using the first-principles calculation, we investigate the structural and electromagnetic properties of the zigzag edge Si nanoribbons (ZSiNRs) decorated with double C chains. The results show that double C chains decorated ZSiNRs are always metallic independent of the ribbon width. The defect states contributed from double C chains are composed of two degenerated bands across the Fermi level. The perfect ZSiNR has a FM ground state, while double C chains decorated one have an AFM ground state. The C chains are always close to straight ones thereby resulting in a transverse contraction near the C chains and thus the ribbon width. The C–Si bond displays an ionic binding feature and the C–H bond is a typical covalent one because of the electronegativity and the bound force difference between H, C and Si atoms.
Structure and charge density distribution for (a) 6-ZSiNR-2C(1, 6), (b) 10-ZSiNR-2C(1, 10). Blue and red colors represent the lowest and the highest magnitude of charge density.Figure optionsDownload as PowerPoint slide
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 56, February 2014, Pages 205–210