Tracks and voids in amorphous Ge induced by swift heavy-ion irradiation

M. C. Ridgway*, T. Bierschenk, R. Giulian, B. Afra, M. D. Rodriguez, L. L. Araujo, A. P. Byrne, N. Kirby, O. H. Pakarinen, F. Djurabekova, K. Nordlund, M. Schleberger, O. Osmani, N. Medvedev, B. Rethfeld, P. Kluth

*Corresponding author for this work

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    86 Citations (Scopus)

    Abstract

    Ion tracks formed in amorphous Ge by swift heavy-ion irradiation have been identified with experiment and modeling to yield unambiguous evidence of tracks in an amorphous semiconductor. Their underdense core and overdense shell result from quenched-in radially outward material flow. Following a solid-to-liquid phase transformation, the volume contraction necessary to accommodate the high-density molten phase produces voids, potentially the precursors to porosity, along the ion direction. Their bow-tie shape, reproduced by simulation, results from radially inward resolidification.

    Original languageEnglish
    Article number245502
    JournalPhysical Review Letters
    Volume110
    Issue number24
    DOIs
    Publication statusPublished - 14 Jun 2013

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