Dislocation formation in the heteroepitaxial growth of PbSe/PbTe systems
Dislocation formation in the heteroepitaxial growth of PbSe/PbTe systems
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PbSe/PbTe 系统异质外延生长中的位错形成
DOI:
10.1016/j.actamat.2023.119308
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发表时间:
2023
期刊:
影响因子:
9.4
通讯作者:
Chen, Youping
中科院分区:
文献类型:
--
作者:
Li, Yang;Gu, Boyang;Diaz, Adrian;Phillpot, Simon R.;McDowell, David L.;Chen, Youping
The paper presents a multiscale study of the kinetic processes of the heteroepitaxial growth of the PbSe/PbTe(111) and PbTe/PbSe(001) systems, using the Concurrent Atomistic-Continuum (CAC) method as the simulation tool. The CAC simulations have reproduced the Stranski–Krastanov growth mode and the layer-by-layer growth mode of the two systems, respectively; the pyramid-shaped island morphology of the PbSe epilayer on PbTe(111), the square-like misfit dislocation networks within the PbTe/PbSe(001) interface, and the critical thickness for the PbTe/PbSe(001) system at which coherent interfaces transit to semi-coherent interfaces with the formation of misfit dislocations, all in good agreement with experimental observations. Four types of misfit dislocations are found to form during the growth of the two PbTe/PbSe heterosystems, and hexagonal-like misfit dislocation networks are observed within the PbSe/PbTe(111) interfaces. The growth processes, including the formation of misfit dislocations, have been visualized. Dislocation half-loops have been observed to nucleate from the epilayer surfaces. These half-loops extend towards the interface by climb or glide motions, interact with other half-loops, and form misfit dislocation networks at the interfaces and threading dislocations extending from interfaces to epilayer surfaces. The dominant types of misfit dislocations in both systems are found to be those with Burgers vectors parallel to the interfaces, whereas the misfit dislocations with Burgers vectors inclined to the interface have a low likelihood of generation and tend to annihilate. The size of the substrate is demonstrated to have a significant effect on the formation, evolution, and distribution of dislocations on the growth of PbSe on PbTe(111).
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影响因子:
1.6
作者:
Shengfeng Yang;Ning Zhang;Youping Chen
通讯作者:
Youping Chen
影响因子:
4.4
作者:
Youping Chen
通讯作者:
Youping Chen
DOI:
--
发表时间:
1974
期刊:
影响因子:
--
作者:
K. Takayanagi;Kunio Kobayashi;K. Yagi;G. Honjo
通讯作者:
G. Honjo
影响因子:
3.9
作者:
Wong, Yuen-Yee;Chang, Edward Yi;Lin, Kung-Liang
通讯作者:
Lin, Kung-Liang
影响因子:
4
作者:
A. Raab;G. Springholz
通讯作者:
G. Springholz