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    Effect of electronic stopping in molecular dynamics simulations of collision cascades in gallium arsenide

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    Authors
    Teunissen, J.L.
    Jarrin, T.
    Richard, N.
    Koval, N.E.
    Santiburcio, D.M.
    Kohanoff, J.
    Artacho, E.
    Cleri, F.
    Da Pieve, F.
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    Discipline
    Physical sciences
    Subject
    Radiation damage
    Scattering of atoms, molecules, clusters & ions
    Time-dependent DFT
    Energy Science & Technology
    Atomic, Molecular & Optical
    Condensed Matter, Materials & Applied Physics
    Nuclear Physics
    Audience
    Scientific
    Date
    2023
    Metadata
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    Description
    Understanding the generation and evolution of defects induced in matter by ion irradiation is of fundamental importance to estimate the degradation of functional properties of materials. Computational approaches used in different communities, from space radiation effects to nuclear energy experiments, are based on a number of approximations that, among others, traditionally neglect the coupling between electronic and ionic degrees of freedom in the description of displacements. In this work, we study collision cascades in GaAs, including the electronic stopping power for self-projectiles in different directions obtained via real-time time-dependent density functional theory in molecular dynamics simulations of collision cascades, using the recent electron-phonon model and the previously developed two-temperature model. We show that the former can be well applied to describe the effects of electronic stopping in molecular dynamics simulations of collision cascades in a multielement semiconductor and that the number of defects is considerably affected by electronic stopping effects. The results are also discussed in the wider context of the commonly used nonionizing energy loss model to estimate degradation of materials by cumulative displacements.
    Citation
    Teunissen, J.L.; Jarrin, T.; Richard, N.; Koval, N.E.; Santiburcio, D.M.; Kohanoff, J.; Artacho, E.; Cleri, F.; Da Pieve, F. (2023). Effect of electronic stopping in molecular dynamics simulations of collision cascades in gallium arsenide. , Physical Review Materials, Vol. 7, Issue 2, A025404, DOI: 10.1103/PhysRevMaterials.7.025404.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/10756
    doi: http://dx.doi.org/10.1103/PhysRevMaterials.7.025404
    scopus:
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
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