Chin. Phys. Lett.  2013, Vol. 30 Issue (7): 076101    DOI: 10.1088/0256-307X/30/7/076101
CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
A Band-Gap Energy Model of the Quaternary Alloy InxGayAl1?x?yN using Modified Simplified Coherent Potential Approximation
ZHAO Chuan-Zhen1,2**,ZHANG Rong 1**, LIU Bin1, LI Ming1, XIU Xiang-Qian1, XIE Zi-Li1, ZHENG You-Dou1
1Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Nanjing National Laboratory of Microstructures, Department of Physics, Nanjing University, Nanjing 210093
2School of Electronics and Information Engineering, Tianjin Polytechnics University, Tianjin 300387
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ZHAO Chuan-Zhen, ZHANG Rong, LIU Bin et al  2013 Chin. Phys. Lett. 30 076101
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Abstract Based on modification of the simplified coherent potential approximation, a model for the band-gap energy of InxGayAl1?x?yN is developed. The parameters of the model are obtained by fitting the experimental band-gap energy of their ternary alloys. It is found that the results agree with the experimental values better than those reported by others, and that the band-gap reduction of InxGayAl1?x?yN with increasing In or Ga content is mainly due to enhanced intraband coupling within the conduction band, and separately within the valence band.
Received: 11 April 2013      Published: 21 November 2013
PACS:  61.66.Dk (Alloys )  
  64.75.+g  
  71.20.Nr (Semiconductor compounds)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/30/7/076101       OR      https://cpl.iphy.ac.cn/Y2013/V30/I7/076101
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ZHAO Chuan-Zhen
ZHANG Rong
LIU Bin
LI Ming
XIU Xiang-Qian
XIE Zi-Li
ZHENG You-Dou
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