作者: Hiroya Nakata
DOI: 10.1016/J.COMMATSCI.2020.109844
关键词: Hydride 、 Kinetic Monte Carlo 、 Ionic bonding 、 Crystal system 、 Massively parallel 、 Biasing 、 Ion 、 Fragmentation (mass spectrometry) 、 Molecular physics 、 Materials science
摘要: Abstract A massively parallel kinetic Monte Carlo (kMC) approach is proposed for simulating ionic migration in a crystal system by introducing the atomic fragmentation scheme (fragment kMC). The fragment kMC method achieved reasonable efficiency with 1728 central processing unit (CPU) cores, and enables simulation of diffusion μ m-scale perovskite crystals. To demonstrate feasibility approach, was applied to predict coefficients hydride ions oxygen SrTiO ( 3 - x ) H BaTiO systems. Finally, customized -scale BaTiO3 under an bias voltage, model evaluated. respective grain sizes are sub-nanometre, we conclude that can be calculate extent materials fully atomistic models at computational cost.