CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Structural Phase Transition and a Mutation of Electron Mobility in Zn$_{x}$Cd$_{1-x}$O Alloys |
Ya-Wei Zhang1,2, Kai-Ke Yang1**, Hui-Xiong Deng1** |
1State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049
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Cite this article: |
Ya-Wei Zhang, Kai-Ke Yang, Hui-Xiong Deng 2018 Chin. Phys. Lett. 35 056401 |
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Abstract We investigate the electronic structures and phase stability of ZnO, CdO and the related alloys in rocksalt (B1) and wurzite (B4) crystal, using the first-principle density functional theory within the hybrid functional approximation. By varying the concentration of Zn components from 0% to 100%, we find that the Zn$_{x}$Cd$_{1-x}$O alloy undergoes a phase transition from octahedron to tetrahedron at $x=0.32$, in agreement with the recent experimental findings. The phase transition leads to a mutation of the electron mobility originated from the changes of the effective mass. Our results qualify ZnO/CdO alloy as an attractive candidate for photo-electrochemical and solar cell power applications.
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Received: 15 January 2018
Published: 30 April 2018
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PACS: |
64.70.kg
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(Semiconductors)
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71.20.Nr
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(Semiconductor compounds)
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11474273 and 11634003, and the Youth Innovation Promotion Association of Chinese Academy of Sciences under Grant No 2017154. |
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