期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.106401
关键词
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资金
- 973 Program [2009CB929101]
- NSF [PHY-0603759]
- NSFC [60525417]
- NKBRSFC [2006CB921400]
- HKUST UGC/RGC [RPC07/08.SC03]
- Direct For Computer & Info Scie & Enginr
- Division of Computing and Communication Foundations [0829860] Funding Source: National Science Foundation
We investigate disordered graphene with strong long-range impurities. Contrary to the common belief that delocalization should persist in such a system against any disorder, as the system is expected to be equivalent to a disordered two-dimensional Dirac fermionic system, we find that states near the Dirac points are localized for sufficiently strong disorder (therefore inevitable intervalley scattering) and the transition between the localized and delocalized states is of Kosterlitz-Thouless type. Our results show that the transition originates from bounding and unbounding of local current vortices.
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