Electronic Transport in Graphene with Aggregated Hydrogen Adatoms

Abstract

Hydrogen adatoms and other species covalently bound to graphene act as resonant scattering centers affecting the electronic transport properties and inducing Anderson localization. We show that attractive interactions between adatoms on graphene and their diffusion mobility strongly modify the spatial distribution, thus fully eliminating isolated adatoms and increasing the population of larger size adatom aggregates. Our scaling analysis shows that such aggregation of adatoms increases conductance by up to several orders of magnitude and results in significant extension of the Anderson localization length in the strong localization regime. We introduce a simple definition of the effective adatom concentration $x^{\star }$ , which describes the transport properties of both random and correlated distributions of hydrogen adatoms on graphene across a broad range of concentrations.

Main text: 5 pages, 5 figures. Supplementary material: 7 pages, 5 figures

References in corpus (20)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• The electronic properties of graphene
• Chiral tunneling and the Klein paradox in graphene
• Anderson Transitions
• Magnetism in Graphene Induced by Single-Atom Defects
• The Kernel Polynomial Method
• Quantum-limited shot noise in graphene
• Hydrogen on graphene: Electronic structure, total energy, structural distortions, and magnetism from first-principles calculations
• Disorder Induced Localized States in Graphene
• Vacancy induced magnetism in graphene and graphene ribbons
• Magnetism in Disordered Graphene and Irradiated Graphite
• Resonant scattering by realistic impurities in graphene
• On resonant scatterers as a factor limiting carrier mobility in graphene
• Monovalent impurities on graphene: midgap states and migration barriers
• Unified description of the dc conductivity of monolayer and bilayer graphene at finite densities based on resonant scatterers
• Optical properties of correlated materials -- Generalized Peierls approach and its application to VO2
• Density inhomogeneity driven percolation metal-insulator transition and dimensional crossover in graphene nanoribbons
• Resonant low-energy electron scattering on short-range impurities in graphene
• Anderson localization of electron states in graphene in different types of disorder
• The effects of disorder and interactions on the Anderson transition in doped Graphene

Cited by in corpus (5)

• Disorder engineering and conductivity dome in ReS2 with electrolyte gating
• Magnetism and interaction-induced gap opening in graphene with vacancies or hydrogen adatoms: Quantum Monte Carlo study
• Large scale chemical functionalization of graphene with nanometer resolution
• Spin inversion in fluorinated graphene n-p junction
• Electronic structure and transport in materials with flat bands: 2D materials and quasicrystals