Nano-porosity in GaSb induced by swift heavy ion irradiation

P. Kluth, J.P. Sullivan, W. Li, R.W. Weed, C.S. Schnohr, R. Giulian, L.L. Araújo, Wen Lei, M.D. Rodriguez, B. Afra, T. Bierschenk, R.C. Ewing, M.C. Ridgway

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    25 Citations (Scopus)

    Abstract

    Nano-porous structures form in GaSb after ion irradiation with 185 MeV Au ions. The porous layer formation is governed by the dominant electronic energy loss at this energy regime. The porous layer morphology differs significantly from that previously reported for low-energy, ion-irradiated GaSb. Prior to the onset of porosity, positron annihilation lifetime spectroscopy indicates the formation of small vacancy clusters in single ion impacts, while transmission electron microscopy reveals fragmentation of the GaSb into nanocrystallites embedded in an amorphous matrix. Following this fragmentation process, macroscopic porosity forms, presumably within the amorphous phase. © 2014 AIP Publishing LLC.
    Original languageEnglish
    Pages (from-to)023105-1 – 023105-4
    JournalApplied Physics Letters
    Volume104
    Issue number2
    DOIs
    Publication statusPublished - 2014

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