Polaron effect on energy spectrum in two-electron quantum dot under magnetic field

Numerical results for the low-lying spectra of parabolic quantum dots in wh ich two electrons interact with each other through both coulomb repulsion a nd longitudinal-optical (LO) phonon under a magnetic field are presented. W ith typical semiconducting GaAs-based materials, the orbital angular moment um L-transition and/or spin angular momentum S-transition takes place in th e ground state, which is qualitatively the same as that without the electro n-LO phonon interaction. The effect of different electron-phonon coupling s trengths on low-lying spectra are also predicted. (C) 2000 Published by Els evier Science Ltd.