title: Tracks and voids in amorphous Ge induced by swift heavy-ion irradiation.
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.
authors.affiliation: Research School of Physics and Engineering, Australian National University, Canberra 0200, Australia.
authors.forename: M C
authors.initials: MC
authors.lastname: Ridgway
authors.affiliation: Research School of Physics and Engineering, Australian National University, Canberra 0200, Australia.
authors.forename: T
authors.initials: T
authors.lastname: Bierschenk
authors.affiliation: Research School of Physics and Engineering, Australian National University, Canberra 0200, Australia.
authors.forename: R
authors.initials: R
authors.lastname: Giulian
authors.affiliation: Research School of Physics and Engineering, Australian National University, Canberra 0200, Australia.
authors.forename: B
authors.initials: B
authors.lastname: Afra
authors.affiliation: Research School of Physics and Engineering, Australian National University, Canberra 0200, Australia.
authors.forename: M D
authors.initials: MD
authors.lastname: Rodriguez
authors.affiliation: Research School of Physics and Engineering, Australian National University, Canberra 0200, Australia.
authors.forename: L L
authors.initials: LL
authors.lastname: Araujo
authors.affiliation: Research School of Physics and Engineering, Australian National University, Canberra 0200, Australia.
authors.forename: A P
authors.initials: AP
authors.lastname: Byrne
authors.affiliation: Australian Synchrotron, Clayton 3168, Australia.
authors.forename: N
authors.initials: N
authors.lastname: Kirby
authors.affiliation: Department of Physics and Helsinki Institute of Physics, University of Helsinki, 00014 Helsinki, Finland.
authors.forename: O H
authors.initials: OH
authors.lastname: Pakarinen
authors.affiliation: Department of Physics and Helsinki Institute of Physics, University of Helsinki, 00014 Helsinki, Finland.
authors.forename: F
authors.initials: F
authors.lastname: Djurabekova
authors.affiliation: Department of Physics and Helsinki Institute of Physics, University of Helsinki, 00014 Helsinki, Finland.
authors.forename: K
authors.initials: K
authors.lastname: Nordlund
authors.affiliation: Fakultät für Physik, Universität Duisburg-Essen, 47057 Duisburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Schleberger
authors.affiliation: Fakultät für Physik, Universität Duisburg-Essen, 47057 Duisburg, Germany and Department of Physics and OPTIMAS Research Center, Technical University of Kaiserslautern, 67663 Kaiserslautern, Germany.
authors.forename: O
authors.initials: O
authors.lastname: Osmani
authors.affiliation: Department of Physics and OPTIMAS Research Center, Technical University of Kaiserslautern, 67663 Kaiserslautern, Germany.
authors.forename: N
authors.initials: N
authors.lastname: Medvedev
authors.affiliation: Department of Physics and OPTIMAS Research Center, Technical University of Kaiserslautern, 67663 Kaiserslautern, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Rethfeld
authors.affiliation: Research School of Physics and Engineering, Australian National University, Canberra 0200, Australia.
authors.forename: P
authors.initials: P
authors.lastname: Kluth