期刊
PHYSICAL REVIEW LETTERS
卷 117, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.046603
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资金
- Dutch Science Foundation NWO/FOM [13PR3118]
- Russian Science Foundation [14-42-00044]
- Deutsche Forschungsgemeinschaft [SPP 1459]
- EU Network FP7-PEOPLE-IRSES under InterNoM [612624]
- Russian Science Foundation [14-42-00044] Funding Source: Russian Science Foundation
We study transport properties of graphene with anisotropically distributed on-site impurities (adatoms) that are randomly placed on every third line drawn along carbon bonds. We show that stripe states characterized by strongly suppressed backscattering are formed in this model in the direction of the lines. The system reveals Levy-flight transport in the stripe direction such that the corresponding conductivity increases as the square root of the system length. Thus, adding this type of disorder to clean graphene near the Dirac point strongly enhances the conductivity, which is in stark contrast with a fully random distribution of on-site impurities, which leads to Anderson localization. The effect is demonstrated both by numerical simulations using the Kwant code and by an analytical theory based on the self-consistent T-matrix approximation.
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