Anomalous Stopping and Charge Transfer in Proton-Irradiated Graphene

Alina Kononov, André Schleife

Research output: Contribution to journalArticlepeer-review


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 σ- and π-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.

Original languageEnglish (US)
Pages (from-to)4816-4822
Number of pages7
JournalNano letters
Issue number11
StatePublished - Jun 9 2021


  • electron capture
  • electron emission
  • electronic stopping power
  • graphene
  • time-dependent density functional theory

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Mechanical Engineering
  • Bioengineering
  • General Materials Science


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