ATOMIC-TO-CONTINUUM MULTISCALE MODELING OF DEFECTS IN CRYSTALS WITH NONLOCAL ELECTROSTATIC INTERACTIONS
ATOMIC-TO-CONTINUUM MULTISCALE MODELING OF DEFECTS IN CRYSTALS WITH NONLOCAL ELECTROSTATIC INTERACTIONS
复制标题
具有非局域静电相互作用的晶体缺陷的原子到连续多尺度建模
DOI:
10.1115/1.4056111
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Dayal, Kaushik
中科院分区:
文献类型:
--
作者:
Jha, Prashant;Marshall, Jason;Knap, Jaroslaw;Dayal, Kaushik
This work develops a multiscale modeling framework for defects in crystals with general geometries and boundary conditions in which ionic interactions are important, with potential application to ionic solids and electric field interactions with materials. The overall strategy is posed in the framework of the quasicontinuum multiscale method; specifically, the use of a finite element inspired kinematic description enables a significant reduction in the large number of degrees-of-freedom to describe the atomic positions. The key advance of this work is a method for the efficient and accurate treatment of nonlocal electrostatic charge–charge interactions without restrictions on the geometry or boundary conditions. Electrostatic interactions are long range with slow decay and hence require consideration of all pairs of charges making a brute-force approach computationally prohibitive. The method proposed here accounts for the exact charge–charge interactions in the near-field and uses a coarse-grained approximation in the far-field. The coarse-grained approximation and the associated errors are rigorously derived based on the limit of a finite body with a small periodic lengthscale, thereby enabling the errors in the approximation to be controlled to a desired tolerance. The method is applied to a simple model of gallium nitride, and it is shown that electrostatic interactions can be approximated with a desired level of accuracy using the proposed methodology.
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DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
D. Kochmann;Jeffrey S. Amelang
通讯作者:
Jeffrey S. Amelang
影响因子:
2.4
作者:
Liping Liu;P. Sharma
通讯作者:
Liping Liu;P. Sharma
DOI:
10.1073/pnas.2102477118
发表时间:
2021-05-25
影响因子:
11.1
作者:
Grasinger, Matthew;Mozaffari, Kosar;Sharma, Pradeep
通讯作者:
Sharma, Pradeep
影响因子:
4.7
作者:
Chen, Lingling;Yang, Xu;Sharma, Pradeep
通讯作者:
Sharma, Pradeep
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
O. Kowalewsky
通讯作者:
O. Kowalewsky