Characterization of irradiation damage distribution near TiO 2/SrTiO 3 interfaces using coherent acoustic phonon interferometry

Dmitry Yarotski; Engang Fu; Li Yan; Quanxi Jia; Yongqiang Wang; Antoinette J. Taylor; Blas P. Uberuaga

doi:10.1063/1.4729621

Characterization of irradiation damage distribution near TiO ₂/SrTiO ₃ interfaces using coherent acoustic phonon interferometry

Dmitry Yarotski
, Engang Fu
, Li Yan
, Quanxi Jia
, Yongqiang Wang
, Antoinette J. Taylor
, Blas P. Uberuaga

Department of Materials Design and Innovation

Los Alamos National Laboratory
Los Alamos National Laboratory Materials Science and Technology Division

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

12 Scopus citations

Abstract

We apply ultrafast coherent acoustic phonon interferometry to characterize the distribution of the radiation damage near the TiO ₂/SrTiO ₃ interfaces. We show that the optical and mechanical properties of anatase TiO ₂ remain unaffected by the radiation dosages in the 0.1 ÷ 5 dpa (displacements per atom) range, while the degraded optical response indicates a significant defect accumulation in the interfacial region of SrTiO ₃ at 0.1 dpa and subsequent amorphization at 3 dpa. Comparison between the theoretical simulations and the experimental results reveals an almost threefold reduction of the sound velocity in the irradiated SrTiO ₃ layer with peak damage levels of 3 and 5 dpa.

Original language	English
Article number	251603
Journal	Applied Physics Letters
Volume	100
Issue number	25
DOIs	https://doi.org/10.1063/1.4729621
State	Published - Jun 18 2012

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title = "Characterization of irradiation damage distribution near TiO 2/SrTiO 3 interfaces using coherent acoustic phonon interferometry",

abstract = "We apply ultrafast coherent acoustic phonon interferometry to characterize the distribution of the radiation damage near the TiO 2/SrTiO 3 interfaces. We show that the optical and mechanical properties of anatase TiO 2 remain unaffected by the radiation dosages in the 0.1 {\textdiv} 5 dpa (displacements per atom) range, while the degraded optical response indicates a significant defect accumulation in the interfacial region of SrTiO 3 at 0.1 dpa and subsequent amorphization at 3 dpa. Comparison between the theoretical simulations and the experimental results reveals an almost threefold reduction of the sound velocity in the irradiated SrTiO 3 layer with peak damage levels of 3 and 5 dpa.",

author = "Dmitry Yarotski and Engang Fu and Li Yan and Quanxi Jia and Yongqiang Wang and Taylor, \{Antoinette J.\} and Uberuaga, \{Blas P.\}",

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doi = "10.1063/1.4729621",

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T1 - Characterization of irradiation damage distribution near TiO 2/SrTiO 3 interfaces using coherent acoustic phonon interferometry

AU - Yarotski, Dmitry

AU - Fu, Engang

AU - Yan, Li

AU - Jia, Quanxi

AU - Wang, Yongqiang

AU - Taylor, Antoinette J.

AU - Uberuaga, Blas P.

PY - 2012/6/18

Y1 - 2012/6/18

N2 - We apply ultrafast coherent acoustic phonon interferometry to characterize the distribution of the radiation damage near the TiO 2/SrTiO 3 interfaces. We show that the optical and mechanical properties of anatase TiO 2 remain unaffected by the radiation dosages in the 0.1 ÷ 5 dpa (displacements per atom) range, while the degraded optical response indicates a significant defect accumulation in the interfacial region of SrTiO 3 at 0.1 dpa and subsequent amorphization at 3 dpa. Comparison between the theoretical simulations and the experimental results reveals an almost threefold reduction of the sound velocity in the irradiated SrTiO 3 layer with peak damage levels of 3 and 5 dpa.

AB - We apply ultrafast coherent acoustic phonon interferometry to characterize the distribution of the radiation damage near the TiO 2/SrTiO 3 interfaces. We show that the optical and mechanical properties of anatase TiO 2 remain unaffected by the radiation dosages in the 0.1 ÷ 5 dpa (displacements per atom) range, while the degraded optical response indicates a significant defect accumulation in the interfacial region of SrTiO 3 at 0.1 dpa and subsequent amorphization at 3 dpa. Comparison between the theoretical simulations and the experimental results reveals an almost threefold reduction of the sound velocity in the irradiated SrTiO 3 layer with peak damage levels of 3 and 5 dpa.

UR - https://www.scopus.com/pages/publications/84863320290

U2 - 10.1063/1.4729621

DO - 10.1063/1.4729621

M3 - Article

AN - SCOPUS:84863320290

SN - 0003-6951

VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 25

M1 - 251603

ER -

Characterization of irradiation damage distribution near TiO ₂/SrTiO ₃ interfaces using coherent acoustic phonon interferometry

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