非晶石墨烯的电子结构
Electronic structure of a realistic model of amorphous graphene
摘要：
在这篇笔记中，我们计算了一个现实的原子模型的非晶石墨烯的电子性质。该模型含有奇数元环，特别是五元环和七元环，没有配位缺陷。我们发现，奇数元环增加了费米能级的电子态密度相对于结晶石墨烯，蜂窝晶格与半金属字符。一些石墨烯样品含有无定形区域，其即使在小浓度下也可能强烈影响结晶石墨烯的许多奇异性质，这是由于完美结晶石墨烯的线性分散和半金属特性而产生的。使用紧束缚模型的$π$状态的费米能级的状态密度的估计。
英文摘要：
In this note, we calculate the electronic properties of a realistic atomistic model of amorphous graphene. The model contains odd membered rings, particularly five and seven membered rings and no coordination defects. We show that odd-membered rings increase the electronic density of states at the Fermi level relative to crystalline graphene; a honeycomb lattice with semi-metallic character. Some graphene samples contain amorphous regions, which even at small concentrations, may strongly affect many of the exotic properties of crystalline graphene, which arise because of the linear dispersion and semi-metallic character of perfectly crystalline graphene. Estimates are given for the density of states at the Fermi level using a tight-binding model for the $π$ states.
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