Effects of strain on electronic properties of graphene

By Seon-Myeong Choi, S. Jhi, Y. Son. 2009

506 citations recorded by the source corpus.

We present first-principles calculations of electronic properties of graphene under uniaxial and isotropic strains, respectively. The semimetallic nature is shown to persist up to a very large uniaxial strain of 30% except a very narrow strain range where a tiny energy gap opens. As the uniaxial strain increases along a certain direction, the Fermi velocity parallel to it decreases quickly and vanishes eventually, whereas the Fermi velocity perpendicular to it increases by as much as 25%. Thus, the low energy properties with small uniaxial strains can be described by the generalized Weyl's equation while massless and massive electrons coexist with large ones. The work function is also predicted to increase substantially as both the uniaxial and isotropic strain increases. Hence, the homogeneous strain in graphene can be regarded as the effective electronic scalar potential.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/2ac63e1ff14cfb22c94775066aac9d8f4294daef

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In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

In Materials Chemistry

Citations in the corpus

Novel effects of strains in graphene and other two dimensional materials (2015, background): “It also arises when applying uniaxial strain in the zigzag direction, a situation that has been discussed at length in the literature [58, 106, 244, 363].”
Random Strain Fluctuations as Dominant Disorder Source for High-Quality On-Substrate Graphene Devices (2014, background): “[49] S.”
Strain effects on thermoelectric properties of two-dimensional materials (2015, unknown): “5% and then closed quickly [60].”
Strain effects in graphene and graphene nanoribbons: The underlying mechanism (2010, methodology): “It was previously suggested using an analytical model that a realistic band gap will be opened under such a collision [43], and a similar effect has also been observed in TB and DFT calculations [26, 30, 31].”
Functionalized graphene materials for hydrogen storage (2020, background): “[155] Choi S-M, Jhi S-H, Son Y-W (2010) Effects of strain on electronic properties of graphene.”