@article{29294232a70e430ea3f98aa0aff6f2bf,
title = "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 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.",
keywords = "electron capture, electron emission, electronic stopping power, graphene, time-dependent density functional theory",
author = "Alina Kononov and Andr{\'e} Schleife",
note = "Funding Information: We thank Pinshane Huang for stimulating discussions. This material is based upon work supported by the National Science Foundation under Grant OAC-1740219. Support from the IAEA F11020 CRP “Ion Beam Induced Spatiotemporal Structural Evolution of Materials: Accelerators for a New Technology Era” is gratefully acknowledged. This research is part of the Blue Waters sustained-petascale computing project, which is supported by the National Science Foundation (awards OCI-0725070 and ACI-1238993) and the state of Illinois. Blue Waters is a joint effort of the University of Illinois at Urbana–Champaign and its National Center for Supercomputing Applications. This work made use of the Illinois Campus Cluster, a computing resource that is operated by the Illinois Campus Cluster Program (ICCP) in conjunction with the National Center for Supercomputing Applications (NCSA) and which is supported by funds from the University of Illinois at Urbana–Champaign. Publisher Copyright: {\textcopyright} ",
year = "2021",
month = jun,
day = "9",
doi = "10.1021/acs.nanolett.1c01416",
language = "English (US)",
volume = "21",
pages = "4816--4822",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "11",
}