We present an in-depth analysis of the electronic and vibrational band structure of uniaxially strained graphene by ab-initio calculations. Depending on the direction and amount of strain, the Fermi crossing moves away from the K-point. However, graphene remains semimetallic under small strains. The deformation of the Dirac cone near the K-point gives rise to a broadening of the 2D Raman mode. In spite of specific changes in the electronic and vibrational band structure the strain-induced frequency shifts of the Raman active E2g and 2D modes are independent of the direction of strain. Thus, the amount of strain can be directly determined from a single Raman measurement.
@article{arxiv.0908.0895,
title = {The two-dimensional Brillouin zone of uniaxially strained graphene},
author = {Marcel Mohr and Konstantinos Papagelis and Janina Maultzsch and Christian Thomsen},
journal= {arXiv preprint arXiv:0908.0895},
year = {2016}
}