Anomalous stopping and charge transfer in proton-irradiated graphene

Abstract

We use first-principles calculations to uncover and explain a new type of anomalous low-velocity stopping effect in proton-irradiated graphene. We attribute a shoulder feature that occurs exclusively for channeling protons to enhanced electron capture from $\sigma$+$\pi$ orbitals. Our analysis of electron emission indicates that backward emission is more sensitive to proton trajectory than forward emission and could thus produce higher contrast images in ion microscopy. For slow protons, we observe a steep drop in emission, consistent with predictions from analytical models.

References in corpus (30)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Van der Waals heterostructures
• Graphene plasmonics
• Operation of Graphene Transistors at GHz Frequencies
• Nonvolatile Memory Cells Based on MoS2/Graphene Heterostructures
• Precision Cutting and Patterning of Graphene with Helium Ions
• Cyclotron Resonance study of the electron and hole velocity in graphene monolayers
• Helium Ion Microscopy
• Tuning the electronic structure of graphene by ion irradiation
• Electronic stopping power in insulators from first principles
• Quantum coherent control of a hybrid superconducting circuit made with graphene-based van der Waals heterostructures
• Electronic stopping power in gold: The role of d electrons and the H/He anomaly
• A brief compendium of time-dependent density-functional theory
• Evolving properties of two dimensional materials, from graphene to graphite
• The electron elevator: excitations across the band gap via a dynamical gap state?
• Examining real-time TDDFT non-equilibrium simulations for the calculation of electronic stopping power
• Charge Exchange and Energy Loss of Slow Highly Charged Ions in 1nm Thick Carbon Nanomembranes
• The Electronic Thickness of Graphene
• Electronic Band Structure Effects in the Stopping of Protons in Copper
• Electronic stopping power in a narrow band gap semiconductor from first principles
• Multi-scale simulations of electron and ion dynamics in self-irradiated silicon
• Electronic stopping for protons and α particles from first-principles electron dynamics: The case of silicon carbide
• Anisotropy of electronic stopping power in graphite
• Electron cascades and secondary electron emission in graphene under energetic ion irradiation
• DFT screened-exchange approach for investigating electronical properties of graphene-related materials
• Pre-equilibrium stopping and charge capture in proton-irradiated aluminum sheets
• $Ab$ $initio$ electronic stopping power and threshold effect of channeled slow light ions in HfO${}_2$
• Electronic stopping and proton dynamics in InP, GaP, and In${}_{0.5}$Ga${}_{0.5}$P from first principles

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• Doublon production in correlated materials by multiple ion impacts
• Ehrenfest dynamics with localized atomic-orbital basis sets within the projector augmented-wave method