Modification of the Peierls-Nabarro model for misfit dislocation

doi:10.1088/1674-1056/ab8459

Abstract For a misfit dislocation, the balance equations satisfied by the displacement fields are modified, and an extra term proportional to the second-order derivative appears in the resulting misfit equation compared with the equation derived by Yao et al. This second-order derivative describes the lattice discreteness effect that arises from the surface effect. The core structure of a misfit dislocation and the change in interfacial spacing that it induces are investigated theoretically in the framework of an improved Peierls-Nabarro equation in which the effect of discreteness is fully taken into account. As an application, the structure of the misfit dislocation for a honeycomb structure in a two-dimensional heterostructure is presented.

Keywords: interfacial misfit dislocation the energy of misfit dislocation

Received: 07 March 2020
Revised: 25 March 2020
Accepted manuscript online:

PACS:	61.72.Bb	(Theories and models of crystal defects)
	61.80.-x	(Physical radiation effects, radiation damage)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11874093).

Corresponding Authors: Shaofeng Wang
E-mail: sfwang@cqu.edu.cn

Cite this article:

Shujun Zhang(张淑君), Shaofeng Wang(王少峰) Modification of the Peierls-Nabarro model for misfit dislocation 2020 Chin. Phys. B 29 056102

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Modification of the Peierls-Nabarro model for misfit dislocation

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