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Nanopore formation in CeO$$_{2}$$ single crystal by ion irradiation; A Molecular dynamics study

Sasajima, Yasushi*; Kaminaga, Ryuichi*; Ishikawa, Norito   ; Iwase, Akihiro*

The nano-pore formation process that occurs by supplying a thermal spike to single crystal CeO$$_{2}$$ has been simulated using a molecular dynamics method. As the initial condition, high thermal energy was supplied to the atoms in a nano-cylinder placed at the center of a fluorite structure. A nano-pore was generated abruptly at around 0.3 ps after the irradiation. It grew to its maximum size at 0.5 ps, and successively it shrank during the time to 1.0 ps. The nano-pore size increased with increasing effective stopping power.

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