中国物理B ›› 2018, Vol. 27 ›› Issue (1): 16301-016301.doi: 10.1088/1674-1056/27/1/016301

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Magnetism and piezoelectricity of hexagonal boron nitride with triangular vacancy

Lu-Si Zhao(赵路丝), Chun-Ping Chen(陈春平), Lin-Lin Liu(刘林林), Hong-Xia Yu(于洪侠), Yi Chen(陈怡), Xiao-Chun Wang(王晓春)   

  1. 1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    2 Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy(Jilin University), Changchun 130012, China
  • 收稿日期:2017-10-12 修回日期:2017-11-16 出版日期:2018-01-05 发布日期:2018-01-05
  • 通讯作者: Xiao-Chun Wang E-mail:wangxiaochun@jlu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11474123) and the Natural Science Foundation of Jilin Province, China (Grant No. 20170101154JC).

Magnetism and piezoelectricity of hexagonal boron nitride with triangular vacancy

Lu-Si Zhao(赵路丝)1,2, Chun-Ping Chen(陈春平)1,2, Lin-Lin Liu(刘林林)1,2, Hong-Xia Yu(于洪侠)1,2, Yi Chen(陈怡)1,2, Xiao-Chun Wang(王晓春)1,2   

  1. 1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    2 Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy(Jilin University), Changchun 130012, China
  • Received:2017-10-12 Revised:2017-11-16 Online:2018-01-05 Published:2018-01-05
  • Contact: Xiao-Chun Wang E-mail:wangxiaochun@jlu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11474123) and the Natural Science Foundation of Jilin Province, China (Grant No. 20170101154JC).

摘要:

First-principle calculations reveal that the configuration system of hexagonal boron nitride (h-BN) monolayer with triangular vacancy can induce obvious magnetism, contrary to that of the nonmagnetic pristine boron nitride monolayer. Interestingly, the h-BN with boron atom vacancy (VB-BN) displays metallic behavior with a total magnetic moment being 0.46μB per cell, while the h-BN with nitrogen atom vacancy (VN-BN) presents a half-metallic characteristic with a total magnetic moment being 1.0μB per cell. Remarkably, piezoelectric stress coefficient e11 of the VN-BN is about 1.5 times larger than that of pristine h-BN. Furthermore, piezoelectric strain coefficient d11 (12.42 pm/V) of the VN-BN is 20 times larger than that of pristine h-BN and also one order of magnitude larger than the value for the h-MoS2 monolayer, which is mainly due to the spin-down electronic state in the VN-BN system. Our study demonstrates that the nitrogen atom vacancies can be an efficient route to tailoring the magnetic and piezoelectric properties of h-BN monolayer, which have promising performances for potential applications in nano-electromechanical systems (NEMS) and nanoscale electronics devices.

关键词: first-principle, magnetism, piezoelectric, nano-electromechanical systems

Abstract:

First-principle calculations reveal that the configuration system of hexagonal boron nitride (h-BN) monolayer with triangular vacancy can induce obvious magnetism, contrary to that of the nonmagnetic pristine boron nitride monolayer. Interestingly, the h-BN with boron atom vacancy (VB-BN) displays metallic behavior with a total magnetic moment being 0.46μB per cell, while the h-BN with nitrogen atom vacancy (VN-BN) presents a half-metallic characteristic with a total magnetic moment being 1.0μB per cell. Remarkably, piezoelectric stress coefficient e11 of the VN-BN is about 1.5 times larger than that of pristine h-BN. Furthermore, piezoelectric strain coefficient d11 (12.42 pm/V) of the VN-BN is 20 times larger than that of pristine h-BN and also one order of magnitude larger than the value for the h-MoS2 monolayer, which is mainly due to the spin-down electronic state in the VN-BN system. Our study demonstrates that the nitrogen atom vacancies can be an efficient route to tailoring the magnetic and piezoelectric properties of h-BN monolayer, which have promising performances for potential applications in nano-electromechanical systems (NEMS) and nanoscale electronics devices.

Key words: first-principle, magnetism, piezoelectric, nano-electromechanical systems

中图分类号:  (First-principles theory)

  • 63.20.dk
75.70.Ak (Magnetic properties of monolayers and thin films) 77.65.Ly (Strain-induced piezoelectric fields) 85.85.+j (Micro- and nano-electromechanical systems (MEMS/NEMS) and devices)