We consider finite ribbons of graphene with armchair orientation of their edges to study in detail impurity effects on specific Dirac-like modes. In the framework of Anderson hybrid model of impurity perturbation, a possibility for Mott localization and for opening of a mobility gap under local impurity perturbations is found and analyzed in function of this model parameters: the impurity energy level, its hybridization with the host Dirac modes, and the impurity concentration. Possible electronic phase states in such disordered system and subsequent phase transitions between them are discussed.

中文翻译：

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杂质对石墨烯扶手椅纳米带中狄拉克模式的影响

我们考虑有限的石墨烯带，其边缘呈扶手椅方向，以详细研究杂质对特定 Dirac 样模式的影响。在杂质扰动的安德森混合模型的框架中，根据该模型参数：杂质能级，其与主体狄拉克模式的杂化，发现并分析了在局部杂质扰动下莫特局域化和打开迁移率间隙的可能性, 和杂质浓度。讨论了这种无序系统中可能的电子相态以及它们之间的后续相变。