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题名: Phase transition and in situ construction of lateral heterostructure of 2D superconducting alpha/beta Mo2C with sharp interface by electron beam irradiation
作者: Liu, Zhibo;  Fei, Zeyuan;  Xu, Chuan;  Jiang, Yixiao;  Ma, Xiu-Liang;  Cheng, Hui-Ming;  Ren, Wencai
发表日期: 2017-6-14
摘要: Lateral heterostructures of 2D materials have several interesting properties and potential applications, and they are usually fabricated by chemical vapor deposition. However, it still remains a great challenge to fabricate 2D lateral heterostructures with well-controlled patterns and sharp interfaces. Herein, we found that the 2D alpha-Mo2C crystal, a recently emerging 2D superconductor, experiences a phase transition from the alpha phase to beta phase on electron beam irradiation in a transmission electron microscope because of the migration of carbon atoms among the molybdenum octahedrons. Combined with first-principles calculations, the carbon atom migration paths and the corresponding energy barriers were discussed. Utilizing this unique phase transition property of 2D alpha-Mo2C crystal, we demonstrated the precise in situ construction of the lateral heterostructure of 2D superconducting alpha/beta Mo2C with a well-controlled pattern and sharp interface using advanced aberration-corrected scanning transmission electron microscopy.
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Recommended Citation:
Liu, Zhibo,Fei, Zeyuan,Xu, Chuan,et al. Phase Transition And In Situ Construction Of Lateral Heterostructure Of 2d Superconducting Alpha/beta Mo2c With Sharp Interface By Electron Beam Irradiation[J]. Nanoscale,2017,9(22):7501-7507.

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