Modification of the Peierls-Nabarro model for misfit dislocation

doi:10.1088/1674-1056/ab8459

中国物理B ›› 2020, Vol. 29 ›› Issue (5): 56102-056102.doi: 10.1088/1674-1056/ab8459

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Modification of the Peierls-Nabarro model for misfit dislocation

Shujun Zhang(张淑君), Shaofeng Wang(王少峰)

Department of Physics and Institute for Structure and Function, Chongqing University, Chongqing 400030, China

收稿日期:2020-03-07 修回日期:2020-03-25 出版日期:2020-05-05 发布日期:2020-05-05
通讯作者: Shaofeng Wang E-mail:sfwang@cqu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11874093).

Modification of the Peierls-Nabarro model for misfit dislocation

Shujun Zhang(张淑君), Shaofeng Wang(王少峰)

Department of Physics and Institute for Structure and Function, Chongqing University, Chongqing 400030, China

Received:2020-03-07 Revised:2020-03-25 Online:2020-05-05 Published:2020-05-05
Contact: Shaofeng Wang E-mail:sfwang@cqu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11874093).

摘要/Abstract

摘要： 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.

关键词: interfacial misfit dislocation, the energy of misfit dislocation

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.

Key words: interfacial misfit dislocation, the energy of misfit dislocation

中图分类号: (Theories and models of crystal defects)

61.72.Bb

61.80.-x (Physical radiation effects, radiation damage)

张淑君, 王少峰. Modification of the Peierls-Nabarro model for misfit dislocation[J]. 中国物理B, 2020, 29(5): 56102-056102.

Shujun Zhang(张淑君), Shaofeng Wang(王少峰). Modification of the Peierls-Nabarro model for misfit dislocation[J]. Chin. Phys. B, 2020, 29(5): 56102-056102.

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Modification of the Peierls-Nabarro model for misfit dislocation

Modification of the Peierls-Nabarro model for misfit dislocation

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