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The effect of native vacancy defects on electronic and magnetic properties of ZnO:Mn system
International Journal of Modern Physics B ( IF 2.6 ) Pub Date : 2020-06-19 , DOI: 10.1142/s0217979220502100
Chun-An Wang 1 , Jun-Xian Li 2 , Si-Lie Fu 2 , Jia-Yi Bao 2 , Tao Lei 2 , Jing Miao 2
Affiliation  

In this paper, the plane wave ultra-soft pseudopotential method was performed to analyze the effect of neutral Zn vacancy (V[Formula: see text]) and O vacancy (V[Formula: see text]) on the electronic and magnetic properties of Mn-doped ZnO systems. In a [Formula: see text] ZnO:Mn supercell, the sites of V[Formula: see text] and V[Formula: see text] were set as nearest neighbor, next nearest neighbor and far nearest neighbor relative to Mn site, respectively. The results indicated that V[Formula: see text] is easier to be produced than V[Formula: see text] in the ZnO:Mn system, and both kinds of defects are more likely to be generated in the nearest neighbor of Mn site. Meanwhile, the ZnO:Mn-V[Formula: see text] system is p-type conductive. The farther the distance between V[Formula: see text] and Mn, the better the conductivity of the system. Contrary to V[Formula: see text], the ZnO:Mn-V[Formula: see text] system is n-type conductive. The farther the distance between V[Formula: see text] and Mn, the worse the conductivity of the system. Furthermore, the ZnO:Mn systems containing neutral V[Formula: see text] or V[Formula: see text] are both likely to be in antiferromagnetic phase. However, the presence of V[Formula: see text] will enhance the possibility, while V[Formula: see text] will weaken it.

中文翻译:

天然空位缺陷对ZnO:Mn体系电学和磁学性质的影响

本文采用平面波超软赝势法,分析了中性Zn空位(V[公式:见文])和O空位(V[公式:见文])对电学和磁学性质的影响。 Mn掺杂的ZnO系统。在[公式:见正文] ZnO:Mn 超晶胞中,V[公式:见正文]和 V[公式:见正文]的位点分别设置为相对于 Mn 位点的最近邻、次近邻和远近邻. 结果表明,在ZnO:Mn体系中,V[公式:见正文]比V[公式:见正文]更容易产生,并且这两种缺陷都更容易在Mn位点的最近邻处产生。同时,ZnO:Mn-V[公式:见正文]系统是p型导电的。V[公式:见正文]与Mn的距离越远,体系的导电性越好。与 V[公式:见正文]相反,ZnO:Mn-V[公式:见正文]系统是 n 型导电的。V[公式:见正文]与Mn的距离越远,体系的导电性越差。此外,含有中性 V[公式:见文本]或 V[公式:见文本]的 ZnO:Mn 系统都可能处于反铁磁相。但是,V[Formula: see text] 的存在会增强这种可能性,而 V[Formula: see text] 会削弱它。
更新日期:2020-06-19
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