稀土Gd掺杂新型二维材料磷烯改性研究  

Study on themodification of new two-dimensional material phosphorene with doping rare earth Gd

作　　者：张琦 张春红 李湘环[1] ZHANG Qi;ZHANG Chun-Hong;LI Xiang-Huan(Mathematics and Physics Institute,Anshun University,Anshun 561000,China;Avionics and Information Network Engineering Center,Anshun University,Anshun 561000,China)

机构地区：[1]安顺学院数理学院,安顺561000 [2]安顺学院航空电子电气与信息网络工程中心,安顺561000

出　　处：《原子与分子物理学报》2021年第3期69-74,共6页Journal of Atomic and Molecular Physics

基　　金：贵州省科学技术厅、安顺市人民政府、安顺学院联合科技基金[黔科合LH字(2017)7042号];安顺学院校级学科平台项目(Asxyxkpt201803);安顺学院校级SRT项目(2017SRT11)。

摘　　要：本文采用第一性原理赝势平面波法,计算并分析了稀土Gd掺杂磷烯的物理结构、电子结构、磁性以及光学性质.计算表明:在掺杂原子Gd附近引起了磷烯物理结构上的变化.能带数量明显增多变密,带隙变窄由0.921 e V变为0.578 e V.同时,由于Gd原子的4f和5d轨道电子两种自旋取向分布具有不对称性,给体系引入了强磁性,计算得到的自旋磁矩为7.470μB.磷烯材料的复介电函数是各向异性的,同时可以得出磷烯材料在其它光学性质方面也是各向异性的.Gd掺杂后使材料的介电性能增强.在紫外光的能量范围内,不同极化方向上的反射率和损失函数的峰值降低,说明Gd的掺入使材料对紫外光的敏感度有所减弱.希望以上研究结果能为新型二维材料磷烯在光电和稀磁半导体材料的设计与开发方面提供理论依据.Based on the first-principles pseudo-potential plane wave method,the physical structure,electronic structure,magnetic and optical properties of the phosphorene with doping rare earth element Gd are calculated and analyzed. The calculated results show that the physical structure of phosphorene is changed near the doped atoms Gd. The energy bands in number increase significantly and become denser,and the band gap is narrowed from 0. 921 eV to 0. 578 eV. At the same time,due to the asymmetry of the two spin orientation distributions of the 4 f and 5 d orbital electrons of the Gd atom,strong magnetism is introduced into the system,and the calculated spin magnetic moment is 7. 470 μB. The optical properties of the phosphorene material are anisotropic. The dielectric properties are enhanced after Gd doping. In the ultraviolet range,the peaks of the reflectivity and loss function decrease,indicating that the incorporation of Gd weakens the material’s sensitivity to ultraviolet light.We hoped that the above results can provide a theoretical basis for the design and development of new two-dimensional material phosphorene in the optoelectronic and dilute magnetic semiconductor materials.

关 键 词：磷烯 第一性原理 稀土 掺杂 电子结构 磁性 光学性质 

分 类 号：O471.5[理学—半导体物理]