Spectral approach to transport in the 2D honeycomb lattice with substitutional disorder

Autor:	Kostadinova, E G, Liaw, C D, Hering, A S, Cameron, A, Guyton, F, Matthews, L S, Hyde, T W
Rok vydání:	2017
Předmět:	Physics - Computational Physics
Zdroj:	Phys. Rev. B 99, 024115 (2019)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.99.024115
Popis:	The transport properties of a disordered two-dimensional (2D) honeycomb lattice are examined numerically using the spectral approach to the quantum percolation problem, characterized by an Anderson-type Hamiltonian. In our simulations, substitutional disorder (or doping) is represented by a modified bimodal probability distribution of the on-site energies. The results indicate the existence of extended energy states for nonzero disorder and the emergence of a transition towards localized behavior for critical doping concentration n_D>0.3%, in agreement with the experimentally observed metal-to-insulator transition in graphene sheet doped with hydrogen. Comment: 21 pages, 9 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1711.09381 Zobrazit plný text záznamu View this record from Arxiv