Fermi Velocity Modulation in Graphene by Strain Engineering
arXiv:1302.1843 · doi:10.1063/1.4791060
Abstract
Using full-potential density functional theory (DFT) calculations, we found a small asymmetry in the Fermi velocity of electrons and holes in graphene. These Fermi velocity values and their average were found to decrease with increasing in-plane homogeneous biaxial strain; the variation in Fermi velocity is quadratic in strain. The results, which can be verified by Landau level spectroscopy and quantum capacitance measurements of bi-axially strained graphene, promise potential applications in graphene based straintronics and flexible electronics.
4 pages, 3 figures. SOLID STATE PHYSICS: Proceedings of the 57th DAE Solid State Physics Symposium 2012, Indian Institute of Technology Bombay, Mumbai, India, 3-7 December 2012, Editors: A. K. Chauhan, Chitra Murli and S. C. Gadkari