The effects of disorder and interactions on the Anderson transition in doped Graphene

Details The effects of disorder and interactions on the Anderson transition in doped Graphene The effects of disorder and interactions on the Anderson transition in doped Graphene

2010-07-19

arxiv.org/abs/1007.3309v3

J. Phys.: Condens. Matter 23 (2011) 205501

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 7 figures

Scientific paper

10.1088/0953-8984/23/20/205501

We undertake an exact numerical study of the effects of disorder on the Anderson localization of electronic states in graphene. Analyzing the scaling behaviors of inverse participation ratio and geometrically averaged density of states, we find that Anderson metal-insulator transition can be introduced by the presence of quenched random disorder. In contrast with the conventional picture of localization, four mobility edges can be observed for the honeycomb lattice with specific disorder strength and impurity concentration. Considering the screening effects of interactions on disorder potentials, the experimental findings of the scale enlarges of puddles can be explained by reviewing the effects of both interactions and disorder.

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