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Title: Synergy of elastic and inelastic energy loss on ion track formation in SrTiO3

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep07726· OSTI ID:1185623

While the interaction of energetic ions with solids is well known to result in inelastic energy loss to electrons and elastic energy loss to atomic nuclei in the solid, the coupled effects of these energy losses on defect production, nanostructure evolution and phase transformations in ionic and covalently bonded materials are complex and not well understood due to dependencies on electron-electron scattering processes, electron-phonon coupling, localized electronic excitations, diffusivity of charged defects, and solid-state radiolysis. Here we show that a colossal synergy occurs between inelastic energy loss and pre-existing atomic defects created by elastic energy loss in single crystal strontium titanate (SrTiO3), resulting in the formation of nanometer-sized amorphous tracks, but only in the narrow region with pre-existing defects. These defects locally decrease the electronic and atomic thermal conductivities and increase electron-phonon coupling, which locally increase the intensity of the thermal spike for each ion. This work identifies a major gap in understanding on the role of defects in electronic energy dissipation and electron-phonon coupling; it also provides insights for creating novel interfaces and nanostructures to functionalize thin film structures, including tunable electronic, ionic, magnetic and optical properties.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1185623
Journal Information:
Scientific Reports, Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 80 works
Citation information provided by
Web of Science

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Cited By (15)

Amorphization kinetics in strontium titanate at 16 and 300 K under argon ion irradiation journal January 2019
Energetic Ion Irradiation-Induced Disordered Nanochannels for Fast Ion Conduction journal October 2018
Fast ion conductivity in strained defect-fluorite structure created by ion tracks in Gd2Ti2O7 journal November 2015
Optical signatures of single ion tracks in ZnO journal January 2020
Swift heavy ion irradiation to ZnO nanoparticles: Steep degradation at low fluences and stable tolerance at high fluences journal October 2018
Insight into picosecond kinetics of insulator surface under ionizing radiation journal January 2020
Simultaneous characterization of cross- and in-plane thermal transport in insulator patterned by directionally aligned nano-channels journal January 2020
Molecular dynamics simulations of the response of pre-damaged SrTiO 3 and KTaO 3 to fast heavy ions journal January 2020
Two-stage synergy of electronic energy loss with defects in LiTaO 3 under ion irradiation journal March 2018
Synergistic effects of nuclear and electronic energy deposition on damage production in KTaO 3 journal July 2018
Swift heavy ion track formation in SrTiO 3 and TiO 2 under random, channeling and near-channeling conditions journal April 2017
Latent tracks and novel infrared waveguide formation in lithium tantalate irradiated with swift heavy ions journal February 2019
Local structure and defects in ion irradiated KTaO 3 journal March 2018
He irradiation‐induced lattice distortion and surface blistering of Gd 2 Zr 2 O 7 defect‐fluorite ceramics journal January 2020
Insights on dramatic radial fluctuations in track formation by energetic ions journal June 2016