期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.227205
关键词
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资金
- Spanish MECD [FIS2008-00124, FIS2011-23712, PIB2010BZ-00512]
- NSF [DRM-1005035]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1005035] Funding Source: National Science Foundation
We investigate some apparent discrepancies between two different models for curved graphene: the one based on tight-binding and elasticity theory, and the covariant approach based on quantum field theory in curved space. We demonstrate that strained or corrugated samples will have a space-dependent Fermi velocity in either approach that can affect the interpretation of local probe experiments in graphene. We also generalize the tight-binding approach to general inhomogeneous strain and find a gauge field proportional to the derivative of the strain tensor that has the same form as the one obtained in the covariant approach.
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