无机材料学报 ›› 2021, Vol. 36 ›› Issue (5): 492-496.DOI: 10.15541/jim20200346

所属专题: 【虚拟专辑】计算材料

• 研究论文 • 上一篇    下一篇

类石墨烯单层结构ZnO和GaN的压电特性对比研究

向晖1,2(), 全慧1, 胡艺媛1, 赵炜骞1, 徐波2,3, 殷江2   

  1. 1.湖北理工学院 数理学院, 黄石 435003
    2.南京大学 固体微结构物理国家重点实验室, 南京 210009
    3.中国药科大学 理学院, 南京 211198
  • 收稿日期:2020-06-22 修回日期:2020-09-30 出版日期:2021-05-20 网络出版日期:2021-04-19
  • 作者简介:向 晖(1986-), 女, 副教授. E-mail:hxiang0717@163.com
  • 基金资助:
    南京大学固体微结构物理国家重点实验室开放课题(M32016);湖北理工学院人才引进项目(18xjz17R);湖北省大学生创新创业训练项目(S201910920041)

Piezoelectricity of Graphene-like Monolayer ZnO and GaN

XIANG Hui1,2(), QUAN Hui1, HU Yiyuan1, ZHAO Weiqian1, XU Bo2,3, YIN Jiang2   

  1. 1. School of Mathematics and Physics, Hubei Polytechnic University, Huangshi 435003, China
    2. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
    3. School of Sciences, China Pharmaceutical University, Nanjing 211198, China
  • Received:2020-06-22 Revised:2020-09-30 Published:2021-05-20 Online:2021-04-19
  • About author:XIANG Hui(1986-), female, associate professor. E-mail:hxiang0717@163.com
  • Supported by:
    Open Project of the State Key Laboratory of Solid Microstructure Physics, Nanjing University(M32016);Hubei Polytechnic University Talent Project(18xjz17R);Hubei Province University Student Innovation and Entrepreneurship Training Project(S201910920041)

摘要:

本研究采用基于密度泛函理论的第一性原理计算了类石墨烯单层结构ZnO(g-ZnO) 和GaN(g-GaN)的力学、电学和压电性质, 重点研究了施加应变后原子坐标弛豫与否的Clamped-ion和Relaxed-ion两种模式的弹性刚度系数和压电张量。结果表明单层g-ZnO和g-GaN均具有半导体属性和较好的弹性。单层g-ZnO和g-GaN的压电系数分别约为9.4和2.2 pm·V-1, 预测这类单层材料在极薄器件中可能具有压电效应, 且g-ZnO的压电性能更好。因此, 类石墨烯单层ZnO有望用于压力传感器、制动器、换能器及能量收集器等纳米尺度器件。

关键词: 压电, 弹性, 电子结构, ZnO, GaN, 类石墨烯单层

Abstract:

By employing density functional theory calculations, the mechanical, electronic and piezoelectric properties of graphene-like monolayers ZnO (g-ZnO) and GaN (g-GaN) were investigated. Elastic stiffness constants and piezoelectric tensors of monolayers g-ZnO and g-GaN using their Clamped-ion and Relaxed-ion components were mainly studied. Results indicate that these two graphene-like structures are semiconductors with excellent elasticity. The piezoelectric coefficient of monolayers g-ZnO and g-GaN are about 9.4 and 2.2 pm·V-1, respectively, implying their piezoelectric effect in extremely thin film devices, especially the g-ZnO. The remarkable piezoelectricity of monolayer g-ZnO enables it a wide range of applications, such as mechanical stress sensors, actuators, transducer and energy harvesting devices.

Key words: piezoelectricity, elasticity, electronic structure, ZnO, GaN, graphene-like monolayer

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