中国物理B ›› 2022, Vol. 31 ›› Issue (10): 106102-106102.doi: 10.1088/1674-1056/ac7dbc

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Identification of the phosphorus-doping defect in MgS as a potential qubit

Jijun Huang(黄及军), and Xueling Lei(雷雪玲)   

  1. Department of Physics, Jiangxi Normal University, Nanchang 330022, China
  • 收稿日期:2022-04-08 修回日期:2022-05-19 出版日期:2022-10-16 发布日期:2022-09-24
  • 通讯作者: Xueling Lei E-mail:xueling@mail.ustc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 12164020) and the Natural Science Foundation of Jiangxi Province, China (Grant No. 20202BAB201012). We gratefully acknowledge Hefei Advanced Computing Center for computational support.

Identification of the phosphorus-doping defect in MgS as a potential qubit

Jijun Huang(黄及军) and Xueling Lei(雷雪玲)   

  1. Department of Physics, Jiangxi Normal University, Nanchang 330022, China
  • Received:2022-04-08 Revised:2022-05-19 Online:2022-10-16 Published:2022-09-24
  • Contact: Xueling Lei E-mail:xueling@mail.ustc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 12164020) and the Natural Science Foundation of Jiangxi Province, China (Grant No. 20202BAB201012). We gratefully acknowledge Hefei Advanced Computing Center for computational support.

摘要: The PS defect is obtained by replacing one S atom with one P atom in the wide-bandgap semiconductor MgS. Based on first-principles calculations, the formation energy, defect levels, and electronic structure of the PS defect in different charge states are evaluated. We predict that the neutral PS0 and positively charged PS+1 are the plausible qubit candidates for the construction of quantum systems, since they maintain the spin conservation during optical excited transition. The zero-phonon lines at the PS0 and PS+1 defects are 0.43 eV and 0.21 eV, respectively, which fall in the infrared band. In addition, the zero-field splitting parameter D of the PS+1 with spin-triplet is 2920 MHz, which is in the range of microwave, showing that the PS+1 defect can be manipulated by microwave. Finally, the principal values of the hyperfine tensor are examined, it is found that they decay exponentially with the distance from the defect site.

关键词: point defects, MgS semiconductor, qubits, first-principles calculations

Abstract: The PS defect is obtained by replacing one S atom with one P atom in the wide-bandgap semiconductor MgS. Based on first-principles calculations, the formation energy, defect levels, and electronic structure of the PS defect in different charge states are evaluated. We predict that the neutral PS0 and positively charged PS+1 are the plausible qubit candidates for the construction of quantum systems, since they maintain the spin conservation during optical excited transition. The zero-phonon lines at the PS0 and PS+1 defects are 0.43 eV and 0.21 eV, respectively, which fall in the infrared band. In addition, the zero-field splitting parameter D of the PS+1 with spin-triplet is 2920 MHz, which is in the range of microwave, showing that the PS+1 defect can be manipulated by microwave. Finally, the principal values of the hyperfine tensor are examined, it is found that they decay exponentially with the distance from the defect site.

Key words: point defects, MgS semiconductor, qubits, first-principles calculations

中图分类号:  (Point defects and defect clusters)

  • 61.72.J-
61.72.jn (Color centers) 61.72.U- (Doping and impurity implantation) 71.22.+i (Electronic structure of liquid metals and semiconductors and their Alloys)