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Title: Self-evolving atomistic kinetic Monte Carlo simulations of defects in materials

Abstract

The recent development of on-the-fly atomistic kinetic Monte Carlo methods has led to an increased amount attention on the methods and their corresponding capabilities and applications. In this review, the framework and current status of Self-Evolving Atomistic Kinetic Monte Carlo (SEAKMC) are discussed. SEAKMC particularly focuses on defect interaction and evolution with atomistic details without assuming potential defect migration/interaction mechanisms and energies. The strength and limitation of using an active volume, the key concept introduced in SEAKMC, are discussed. Potential criteria for characterizing an active volume are discussed and the influence of active volume size on saddle point energies is illustrated. A procedure starting with a small active volume followed by larger active volumes was found to possess higher efficiency. Applications of SEAKMC, ranging from point defect diffusion, to complex interstitial cluster evolution, to helium interaction with tungsten surfaces, are summarized. A comparison of SEAKMC with molecular dynamics and conventional object kinetic Monte Carlo is demonstrated. Overall, SEAKMC is found to be complimentary to conventional molecular dynamics, especially when the harmonic approximation of transition state theory is accurate. However it is capable of reaching longer time scales than molecular dynamics and it can be used to systematically increase the accuracymore » of other methods such as object kinetic Monte Carlo. Furthermore, the challenges and potential development directions are also outlined.« less

Authors:
 [1];  [2];  [2];  [2]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Defect Physics in Structural Materials (CDP); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Defect Physics (CDP)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1185974
Alternate Identifier(s):
OSTI ID: 1250301
Grant/Contract Number:  
AC05-00OR22725; ERKCS99
Resource Type:
Accepted Manuscript
Journal Name:
Computational Materials Science
Additional Journal Information:
Journal Volume: 100; Journal ID: ISSN 0927-0256
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 97 MATHEMATICS AND COMPUTING; kinetic Monte Carlo; Self-Evolving Atomistic Kinetic Monte Carlo (SEAKMC); on-the-fly; time scale; active volume

Citation Formats

Xu, Haixuan, Beland, Laurent K., Stoller, Roger E., and Osetskiy, Yury N.. Self-evolving atomistic kinetic Monte Carlo simulations of defects in materials. United States: N. p., 2015. Web. https://doi.org/10.1016/j.commatsci.2014.12.026.
Xu, Haixuan, Beland, Laurent K., Stoller, Roger E., & Osetskiy, Yury N.. Self-evolving atomistic kinetic Monte Carlo simulations of defects in materials. United States. https://doi.org/10.1016/j.commatsci.2014.12.026
Xu, Haixuan, Beland, Laurent K., Stoller, Roger E., and Osetskiy, Yury N.. Thu . "Self-evolving atomistic kinetic Monte Carlo simulations of defects in materials". United States. https://doi.org/10.1016/j.commatsci.2014.12.026. https://www.osti.gov/servlets/purl/1185974.
@article{osti_1185974,
title = {Self-evolving atomistic kinetic Monte Carlo simulations of defects in materials},
author = {Xu, Haixuan and Beland, Laurent K. and Stoller, Roger E. and Osetskiy, Yury N.},
abstractNote = {The recent development of on-the-fly atomistic kinetic Monte Carlo methods has led to an increased amount attention on the methods and their corresponding capabilities and applications. In this review, the framework and current status of Self-Evolving Atomistic Kinetic Monte Carlo (SEAKMC) are discussed. SEAKMC particularly focuses on defect interaction and evolution with atomistic details without assuming potential defect migration/interaction mechanisms and energies. The strength and limitation of using an active volume, the key concept introduced in SEAKMC, are discussed. Potential criteria for characterizing an active volume are discussed and the influence of active volume size on saddle point energies is illustrated. A procedure starting with a small active volume followed by larger active volumes was found to possess higher efficiency. Applications of SEAKMC, ranging from point defect diffusion, to complex interstitial cluster evolution, to helium interaction with tungsten surfaces, are summarized. A comparison of SEAKMC with molecular dynamics and conventional object kinetic Monte Carlo is demonstrated. Overall, SEAKMC is found to be complimentary to conventional molecular dynamics, especially when the harmonic approximation of transition state theory is accurate. However it is capable of reaching longer time scales than molecular dynamics and it can be used to systematically increase the accuracy of other methods such as object kinetic Monte Carlo. Furthermore, the challenges and potential development directions are also outlined.},
doi = {10.1016/j.commatsci.2014.12.026},
journal = {Computational Materials Science},
number = ,
volume = 100,
place = {United States},
year = {2015},
month = {1}
}

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    Works referencing / citing this record:

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