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Citation: WU Hai-Fei, CHEN Yao, XU Shan-Hu, YAN Yong-Hong, SI Jian-Xiao, TAN Yong-Sheng. Molecular Beam Epitaxy Growth and Surface Structural Characteristics of PbTe(111) Thin Film[J]. Acta Physico-Chimica Sinica, ;2017, 33(2): 419-425. doi: 10.3866/PKU.WHXB201610192 shu

Molecular Beam Epitaxy Growth and Surface Structural Characteristics of PbTe(111) Thin Film

1.
Department of Physics, Shaoxing University, Shaoxing 312000, Zhejiang Province, P. R. China;
2.
College of Mathematics, Physics and Information Engineering, Zhejiang Normal University, Jinhua 312004, Zhejiang Province, P. R. China

Received Date: 9 August 2016
Revised Date: 18 October 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (51202149, 51302248, 11575116, 61405118).

PbTe thin films were epitaxially grown on BaF₂(111) substrate using molecular beam epitaxy (MBE). In situ characterization by reflection high energy electron diffraction (RHEED) revealed a transition of the growth mode from 3D to 2D. Rotational symmetry studies combined with first principles density functional theory (DFT) calculations revealed that under Pb-rich and 350℃ substrate temperature (T_sub) growth conditions, stable (2×1) reconstructions appear on the PbTe(111) surface. When the surface of PbTe(111)-(2×1) was covered with Te, the stable (2×1) reconstructions could be retrieved under 300℃ annealing. This provides an effective method for the protection of PbTe film surfaces from the atmospheric environment.
- Surface reconstruction,
- DFT,
- RHEED,
- Rotational symmetry,
- PbTe thin film
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