English

Transport and particle-hole asymmetry in graphene on boron nitride

Mesoscale and Nanoscale Physics 2015-06-18 v2 Materials Science

Abstract

All local electronic properties of graphene on a hexagonal boron nitride (hBN) substrate exhibit spatial moir\'e patterns related to lattice constant and orientation differences between shared triangular Bravais lattices. We apply a previously derived effective Hamiltonian for the π\pi-bands of graphene on h-BN to address the carrier-dependence of transport properties, concentrating on the conductivity features at four electrons and four holes per unit cell. These transport features measure the strength of Bragg scattering of π\pi-electrons off the moir\'e pattern, and exhibit a striking particle-hole asymmetry that we trace to specific features of the effective Hamiltonian that we interpret physically.

Keywords

Cite

@article{arxiv.1503.04312,
  title  = {Transport and particle-hole asymmetry in graphene on boron nitride},
  author = {Ashley M. DaSilva and Jeil Jung and Shaffique Adam and Allan H. MacDonald},
  journal= {arXiv preprint arXiv:1503.04312},
  year   = {2015}
}