Two regimes of ionization-induced recovery in SrTiO3 under irradiation

William J. Weber; Haizhou Xue; Eva Zarkadoula; Yanwen Zhang

doi:10.1016/j.scriptamat.2019.08.013

Two regimes of ionization-induced recovery in SrTiO₃ under irradiation

William J. Weber, Haizhou Xue, Eva Zarkadoula, Yanwen Zhang

Nanomaterials Theory Institute

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

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. 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.

Original language	English
Pages (from-to)	154-157
Number of pages	4
Journal	Scripta Materialia
Volume	173
DOIs	https://doi.org/10.1016/j.scriptamat.2019.08.013
State	Published - Dec 2019

Funding

This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Division of Materials Sciences and Engineering under Contract DE-AC05-00OR22725. The RBS/C analysis was partially supported by the University of Tennessee Governor's Chair program.

Keywords

Defects
Molecular dynamics
Perovskite
Recovery
Rutherford backscattering spectrometry/channeling (RBS)

Access to Document

10.1016/j.scriptamat.2019.08.013

Cite this

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title = "Two regimes of ionization-induced recovery in SrTiO3 under irradiation",

abstract = "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. 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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AU - Weber, William J.

AU - Xue, Haizhou

AU - Zarkadoula, Eva

AU - Zhang, Yanwen

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Y1 - 2019/12

N2 - 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. 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.

AB - 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. 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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