磷烯量子点锯齿形边界上的磁性研究

Magnetic properties of the zigzag edge of phosphorene quantum dots

近些年被成功合成的磷烯,由于其具有独特的空间褶皱结构,以及有限宽度的带隙和很高的载流子迁移率,而备受研究者的关注.本文通过有限温行列式量子蒙特卡罗方法,研究了磷烯量子点的边界磁性随温度的依赖关系.在蜂巢晶格哈伯德模型框架下,数值结果表明,一个相对小的相互作用可以在磷烯量子点的锯齿形边界上诱导出类铁磁性,并且这种边缘磁性的居里温度有可能达到室温.

The recent successful synthesis of phosphorene has attracted much attention due to its finite band gap and high carrier mobility.Finite temperature determinant quantum Monte Carlo method was used to investigate the temperature dependence of the edge magnetism of phosphorus quantum dots.Honeycomb lattice Hubbard model found that a relatively small interaction may induce ferromagnetic like behavior on the zigzag edge of the phosphorene quantum dots,therefore Curie temperature may be up to room temperature.