Applied electric field and hydrostatic pressure effects on quasistationary states in single and coupled GaAs-(Ga,Al)As quantum wells

21st Latin American Symposium on Solid State Physics

Schönhöbel, A.M.^1 ; Girón, J.A.^1 ; Porras-Montenegro, N.^1

Group of Solid-State Theoretical Physics, Departamento de Fisica, Universidad Del Valle, Cali, A.A 25360, Colombia^1

关键词: Al-concentration;    Confinement potential;    Density of state;    Double quantum well;    Numerical results;    Quasi-stationary state;    Single quantum well;    Uniform electric fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/480/1/012027/pdf
DOI  :  10.1088/1742-6596/480/1/012027

来源: IOP

【 摘 要 】

We have studied the effects of hydrostatic pressure and an uniform electric field on the electron energy levels GaAs-(Ga,Al)As single quantum wells (QWs) and coupled double quantum wells (DQWs) by using the Enderlein's method to solve exactly the Schrodringer equation. Numerical results were obtained using the density of states (DOS) as a function of the applied electric field, hydrostatic pressure, Al concentration, and the geometry as well. We found that the quasistationary ground and excited states energy diminish with and the applied electric field, increase with the confinement potential and the width of central barrier in the DQW. In the latter structure we observed the anti-crossing between the first and second quasistationary energy levels. We found that the applied electric field and the hydrostatic pressure modify the period of Pulsations in QWs.