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Single wall carbon nanotubes density of states: comparison of experiment and theory

机译:单壁碳纳米管的状态密度:实验与理论的比较

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摘要

We study the electronic structure of a variety of single wall carbon nanotubes and report density of states obtained with the Perdew-Burke-Ernzerhof (PBE) generalized gradient approximation and hybrid PBE0 approximation of density functional theory using Gaussian orbitals and periodic boundary conditions. PBE gives very good results for metallic tubes but the addition of a portion of exact exchange in the hybrid PBE0 functional worsens the agreement between experiment and theory. On the other hand, the PBE0 hybrid significantly improves the theoretical predictions (compared to PBE) for semiconducting tubes. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 29]
机译:我们研究了各种单壁碳纳米管的电子结构,并报告了使用高斯轨道和周期边界条件的密度泛函理论的Perdew-Burke-Ernzerhof(PBE)广义梯度逼近和混合PBE0逼近所获得的状态密度。对于金属管,PBE给出了非常好的结果,但是在混合PBE0功能中添加了一部分精确交换,这恶化了实验与理论之间的一致性。另一方面,PBE0杂化显着改善了半导体管的理论预测(与PBE相比)。 (C)2003 Elsevier Science B.V.保留所有权利。 [参考:29]

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