Tuning the band gap and optical spectra of silicon-doped graphene: Many-body effects and excitonic states

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• 作者：Masoud Shahrokhi ; ^{shahrokhimasoud37@gmail.com} ; Cé ; line Leonard ; ^{celine.leonard@u-pem.fr}
• 关键词：Graphene ; Density functional theory ; GW calculation ; BSE approach
• 刊名：Journal of Alloys and Compounds
• 出版年：2017
• 出版时间：5 February 2017
• 年：2017
• 卷：693
• 期：Complete
• 页码：1185-1196
• 全文大小：3178 K
• 卷排序：693

文摘

The electronic and optical properties of SiG systems are investigated. The electronic properties were analyzed at three levels of GW approach. The optical properties of these materials are investigated using the BSE approach. Optical properties of these systems strongly dominated by excitonic effects. Spectrum for these systems is dominated by strongly bound Frenkel excitons.