Bound polaron in a quantum pseudodot under Rashba effect

•The influence of Rashba effect on bound polaron in a quantum pseudodot is studied.•We have used the Lee–Low–Pines unitary transformation method and the Pekar type variational procedure.•The ground state energy is decreased with raising the Coulomb bound potential.•The ground state energy increases when the wave vector is increasing.•The ground state energy splits into two branches due to the Rashba effect.

In the present work, the influence of Rashba effect on bound polaron in a quantum pseudodot is studied. Using the Lee–Low–Pines unitary transformation method and the Pekar type variational procedure, we have derived an expression for the bound polaron ground state energy. The ground state energy as functions of the wave vector, the electron–phonon coupling strength, and quantum confinement size is obtained by considering different Coulomb bound potentials. It is found that (i) the ground state energy is decreased with raising the Coulomb bound potential, the electron–phonon coupling strength, and quantum confinement size. (ii) The ground state energy increases when the wave vector is increasing. (iii) The ground state energy splits into two branches (spin-up and spin-down) due to the Rashba effect.

Graphical abstractWe have studied the influence of the Rashba effect on bound polaron in a quantum pseudodot. We have used the Lee–Low–Pines unitary transformation method and the Pekar type variational procedure and derive an expression for the bound polaron ground state energy.Figure optionsDownload full-size imageDownload as PowerPoint slide