吉首大学学报(自然科学版) ›› 2021, Vol. 42 ›› Issue (4): 31-37.DOI: 10.13438/j.cnki.jdzk.2021.04.007

• 物理 • 上一篇    下一篇

磷烯-硼碳二磷异质结电子输运性质的掺杂调控

吴丹,廖文虎,林丽娥,罗淑珍,程小丽   

  1. (吉首大学物理与机电工程学院,湖南 吉首 416000)
  • 出版日期:2021-07-25 发布日期:2021-11-17
  • 通讯作者: 廖文虎(1978—),男,湖北宜昌人,吉首大学物理与机电工程学院教授,硕士生导师,主要从事介观纳米体系量子输运及其调控研究.
  • 作者简介:吴丹(1992—),女,贵州毕节人,吉首大学物理与机电工程学院物理学硕士研究生,主要从事低维半导体器件与物理研究
  • 基金资助:
    国家自然科学基金资助项目(11664010,11264013);湖南省自然科学基金资助项目(2017JJ2217,12JJ4003);湖南省教育厅重点项目(18A293);吉首大学研究生科研项目(JDY19039,JDY20031)

Doping Manipulationon the Electron Transport Properties of the Phosphorene-Boron Carbon Diphosphorus Heterojunction

WU Dan, LIAO Wenhu, LIN Lie, LUO Shuzhen, CHENG Xiaoli   

  1. (College of Physics, Mechanical and Electrical Engineering, Jishou University, Jishou 416000, Hunan China)
  • Online:2021-07-25 Published:2021-11-17

摘要:利用密度泛函理论与非平衡格林函数相结合的第一性原理计算方法,研究了有限偏压下扶手椅边缘和锯齿边缘磷烯-硼碳二磷(P-BC2P)范德瓦尔斯异质结的电子输运性质,以及N型电子/P型空穴掺杂对2种边缘形貌异质结电子输运性质的影响.研究结果表明:(1)有限偏压下,2种边缘形貌P-BC2P范德瓦尔斯异质结均呈现非线性变化和负微分电阻效应.扶手椅边缘P-BC2P异质结的电流增长快于扶手椅边缘磷烯纳米带,锯齿边缘P-BC2P异质结的电流增长慢于锯齿边缘磷烯纳米带.(2)掺杂浓度0.001~0.01 e/atom范围内,N型电子/P型空穴掺杂能有效调控P-BC2P异质结的电导.相比未掺杂,扶手椅边缘P-BC2P异质结的电导在P型空穴掺杂时最多增加和最多减少均为20%,在N型电子掺杂时最多减少46.7%;锯齿边缘P-BC2P异质结的电导在P型空穴掺杂时最多增加196%,在N型电子掺杂时最多增加164%.

关键词: 磷烯-硼碳二磷异质结, 电子输运性质, 第一性原理, 电子掺杂, 空穴掺杂

Abstract: Using the first-principles calculation method combining density functional theory and non-equilibrium Green's function, the electron transport properties of the armchair edge and the zigzag P-BC2P van der Waals heterojunction under finite bias are studied, and the influence of N-type electrons and P-type holes doping on the electron transport properties of the two edge types of heterojunctions. The research results show that: (1) Under the finite bias voltage, the two edge types P-BC2P van der Waals heterojunctions both exhibit nonlinear changes and negative differential resistance effects. The current growth of the P-BC2P heterojunction at the edge of the armchair is faster than that of the phosphorene nanoribbons, but the current growth of the P-BC2P heterojunction at the zigzag edge is slower than that of the phosphorene nanoribbons. (2) In the doping concentration range of 0.001~0.01 e/atom, N-type electrons/P-type holes doping can effectively control the conductance of P-BC2P heterojunction. Compared with the undoped, the conductance of the P-BC2P heterojunction at the edge of the armchair increases and decreases by up to 20% when doped with P-type holes, and decreases by up to 46.7% when doped with N-type electrons. The conductance of the zigzag edge P-BC2P heterojunction increases up to 196% when doped with P-type holes, and increases up to 164% when doped with N-type electrons.

Key words: P-BC2P heterojunction, electron transport properties, first principles, electrons doping, holesdoping

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