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

15 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.

Funders	Funder number
University of Tennessee Governor
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Division of Materials Sciences and Engineering	DE-AC05-00OR22725

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.",

keywords = "Defects, Molecular dynamics, Perovskite, Recovery, Rutherford backscattering spectrometry/channeling (RBS)",

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AU - Weber, William J.

AU - Xue, Haizhou

AU - Zarkadoula, Eva

AU - Zhang, Yanwen

PY - 2019/12

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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