中国物理B ›› 2021, Vol. 30 ›› Issue (10): 107801-107801.doi: 10.1088/1674-1056/abf130

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Conductance and dielectric properties of hydrogen and hydroxyl passivated SiCNWs

Wan-Duo Ma(马婉铎), Ya-Lin Li(李亚林), Pei Gong(龚裴), Ya-Hui Jia(贾亚辉), and Xiao-Yong Fang(房晓勇)   

  1. Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
  • 收稿日期:2021-01-12 修回日期:2021-02-22 接受日期:2021-03-24 发布日期:2021-09-26
  • 通讯作者: Xiao-Yong Fang E-mail:fang@ysu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11574261) and the Natural Science Foundation of Hebei Province, China (Grant No. A2021203030).

Conductance and dielectric properties of hydrogen and hydroxyl passivated SiCNWs

Wan-Duo Ma(马婉铎), Ya-Lin Li(李亚林), Pei Gong(龚裴), Ya-Hui Jia(贾亚辉), and Xiao-Yong Fang(房晓勇)   

  1. Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
  • Received:2021-01-12 Revised:2021-02-22 Accepted:2021-03-24 Published:2021-09-26
  • Contact: Xiao-Yong Fang E-mail:fang@ysu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11574261) and the Natural Science Foundation of Hebei Province, China (Grant No. A2021203030).

摘要: Based on the transport theory and the polarization relaxation model, the effects of hydrogen and hydroxyl passivation on the conductivity and dielectric properties of silicon carbide nanowires (SiCNWs) with different sizes are numerically simulated. The results show that the variation trend of conductivity and band gap of passivated SiCNWs are opposite to the scenario of the size effect of bare SiCNWs. Among the influencing factors of conductivity, the carrier concentration plays a leading role. In the dielectric properties, the bare SiCNWs have a strong dielectric response in the blue light region, while passivated SiCNWs show a more obvious dielectric response in the far ultraviolet-light region. In particular, hydroxyl passivation produces a strong dielectric relaxation in the microwave band, indicating that hydroxyl passivated SiCNWs have a wide range of applications in electromagnetic absorption and shielding.

关键词: silicon carbide nanowires, passivation, conductance properties, dielectric relaxation

Abstract: Based on the transport theory and the polarization relaxation model, the effects of hydrogen and hydroxyl passivation on the conductivity and dielectric properties of silicon carbide nanowires (SiCNWs) with different sizes are numerically simulated. The results show that the variation trend of conductivity and band gap of passivated SiCNWs are opposite to the scenario of the size effect of bare SiCNWs. Among the influencing factors of conductivity, the carrier concentration plays a leading role. In the dielectric properties, the bare SiCNWs have a strong dielectric response in the blue light region, while passivated SiCNWs show a more obvious dielectric response in the far ultraviolet-light region. In particular, hydroxyl passivation produces a strong dielectric relaxation in the microwave band, indicating that hydroxyl passivated SiCNWs have a wide range of applications in electromagnetic absorption and shielding.

Key words: silicon carbide nanowires, passivation, conductance properties, dielectric relaxation

中图分类号:  (Nanowires)

  • 78.67.Uh
81.65.Rv (Passivation) 87.16.Uv (Active transport processes) 77.22.Gm (Dielectric loss and relaxation)