Two regimes of ionization-induced recovery in SrTiO3 under irradiation

Weber, William; Xue, Haizhou; Zarkadoula, Eva; Zhang, Yanwen

doi:10.1016/j.scriptamat.2019.08.013

Title: Two regimes of ionization-induced recovery in SrTiO₃ under irradiation

Journal Article · 01 December 2019 · Scripta Materialia

DOI: https://doi.org/10.1016/j.scriptamat.2019.08.013 · OSTI ID:1559652

^[1]; Xue, Haizhou ^[2];

^[1];

^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States)

Irradiation of pre-damaged SrTiO₃ with 2 MeV He, 1.2 MeV C, 5 MeV C and 12 MeV O ions reveals two regimes of ionization-induced recovery. For C and O ions, with electronic energy loss between 1.6 and 3 keV/nm, recovery cross-sections range from 0.27 to 0.38 nm², and molecular dynamics confirms recovery related to ionization-induced thermal spikes via electron-phonon coupling. Lastly, at lower electronic energy losses, recovery cross-sections decrease to about 5.5 × 10^-4 nm² for 2 MeV He ions and 1.0 × 10^-5 nm² for 200 keV electrons, which suggests recovery associated with local electronic excitation processes.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1559652

Journal Information:: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: N/A Vol. 173; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Molecular dynamics simulations of the response of pre-damaged SrTiO ₃ and KTaO ₃ to fast heavy ions Zarkadoula, Eva; Zhang, Yanwen; Weber, William J. AIP Advances, Vol. 10, Issue 1 https://doi.org/10.1063/1.5133061	journal	January 2020

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