原子与分子物理学报2024，Vol.41Issue(3)：71-77,7.DOI:10.19855/j.1000-0364.2024.032002
硼磷烯量子点的电子结构和光学性质研究
Study on electronic structure and optical properties of monolayer hexagonal boron phosphide quantum dots
摘要
Abstract
The electronic structure and optical properties of monolayer hexagonal boron phosphide quantum dots with zigzag shape are studied by using tight binding method under planar electric and vertical magnetic fields.The results show that the energy gap of monolayer hexagonal boron phosphide quantum dots,as direct bandgap semiconductors,does not change with the size in the absence of electric or magnetic field.Under the control of the plane electric field,the energy gap gradually decreases with the increase of the electric field until it disap-pears.The direction of the plane electric field almost has no effect on the monolayer hexagonal boron phosphide quantum dots,and the strength of electric field required for the disappearance of the energy gap gradually decrea-ses with the increase of the quantum dot size.Under the control of vertical magnetic field,the energy levels forms the Landau levels,while the Landau level at the edge of the energy gap is approximately a flat band,which does not change with the change of magnetic flux,and the density of states is mainly distributed at this Landau level.In addition,light absorption under vertical magnetic field is mainly caused by the transition between Landau levels.关键词
硼磷烯/量子点/紧束缚近似方法/电子结构和光学性质/电场和磁场Key words
Monolayer hexagonal boron phosphide/Quantum dots/Tight binding method/Electronic structure and optical properties/Electric and magnetic fields分类
化学化工引用本文复制引用
王乃晔,陈桥..硼磷烯量子点的电子结构和光学性质研究[J].原子与分子物理学报,2024,41(3):71-77,7.基金项目
湖南省自然科学基金(2022JJ424) （2022JJ424）
湖南工程学院研究生科研创新项目(YC202216) （YC202216）
