论文标题
石墨烯扶手椅Nanoribbons中狄拉克模式的杂质影响
Impurity effects on Dirac modes in graphene armchair nanoribbons
论文作者
论文摘要
我们考虑将石墨烯的有限丝带和其边缘的扶手椅取向，以详细研究杂质对特定的类似狄拉克样模式的影响。在安德森混合扰动模型的框架内，发现并在局部杂质扰动下开放了莫特定位和打开移动性差距的可能性，并在该模型参数的功能中进行了分析：杂质能量水平，其与宿主狄拉克模式的杂交以及杂质浓度的杂交。讨论了这种无序系统中可能的电子相状态和它们之间随后的相变。
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.
