Electronic Correlation Effects on the Optical Properties of SiC,BeO and Boron Nitride Nanotubes and Monolayers

作     者：H.Rezania Z.Aghaii Manesh 

作者机构：Department of PhysicsRazi University 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2015年第64卷第11期

页      面：583-589页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0704[理学-天文学] 070301[理学-无机化学] 0702[理学-物理学] 

主　　题：nanotube optical conductivity Hubbard model 

摘      要：We present numerical calculation of the impact of electron-electron interaction on the behavior of density of states and optical properties of BeO,SiC and Boron-Nitride nanotubes and *** model hamiltonian is applied to describe the dynamics of electrons on the lattice structure of theses *** excitation spectrum of the system in the presence of local electronic interactions has been found using mean Seld *** find the band gap width in both optical absorption and density of states reduces with local Hubbard electronic interaction *** absorption spectra exhibits the remarkable peaks,mainly owing to the divergence behavior of density of states and excitonic *** we compare optical absorption frequency behavior of BeO,SiC and Boron-Nitride nanotubes with each *** we investigate the optical properties of BeO and SiC sheets.A novel feature of optical conductivity of these structures is the decrease of frequency gap in the optical spectrum due to electronic interaction.