EFFECT OF ELECTRON-CONFINED LO-PHONON INTERACTION ON SHALLOW DONORS IN QUANTUM-WELL WIRES

We have investigated the polaron bound to a fixed hydrogenic impurity placed on the axis of the quantum wire. The ground impurity binding en ergy and the effective potential due to the interaction between electr on and the confined LO-phonons and the effective mass are calculated b y means of Lee-Low-Pines variational treatment. It is shown that the e ffective potential induced by the interaction of the electron with the confined LO-phonons is very small at the boundary of the quantum wire , while the potential rises to the maximum value on the axis of the qu antum wire.