1s-like state binding energy of a donor impurity bound to Xz valleys of GaAs/AlAs type II quantum dots with an uniform applied magnetic field

21st Latin American Symposium on Solid State Physics

Villamil, Pablo^1 ; Ríos, Carlos L Beltrán^2

Departamento de Matematicas y Física, Grupo de Teoría de la Materia Condensada, Universidad de Sucre, Sincelejo A.A. 406, Colombia^1

Escuela de Física, Universidad Industrial de Santander, A.A. 678 Bucaramanga, Colombia^2

关键词: Applied magnetic fields;    Cylinder axis;    Different-magnetic fields;    Donor impurities;    Effective mass;    Type II quantum dots;    Uniform magnetic fields;    Variational methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/480/1/012001/pdf
DOI  :  10.1088/1742-6596/480/1/012001

来源: IOP

【 摘 要 】

In this paper we calculate the binding energy of a donor impurity in the 1s-like state bound to X valleys of GaAs/AlAs type II quantum dots, using an anisotropic variational method, which allows us to take into account the anisotropy of the effective mass and quantum confinement. The binding energy is plotted against the radius of the cylinder and the uniform magnetic field applied along the cylinder axis. The binding energies have a monotone behavior with the cylinder radius for different magnetic fields and almost constant behavior with increasing magnetic field.