Dynamic Properties of Acoustic and Optical Polaron Under Asymmetric Hyperbolic-Type Quantum Well

Abstract

The effects of an asymmetric hyperbolic-type quantum well (AHTQW) on dynamic properties of acoustic and optical polaron under external electric field has been evaluated. The ground state energy, the mobility and the lifetime of acoustic and optical polaron have been investigated using the variational Pekar method and the quantum statistical theory. The results have shown that, in contrast to the quantum well parameter, the confinement potential of the AHTQW increases the ground state energy, the mobility and the lifetime of both acoustic and optical polaron. In addition, due to the highest energy of optical phonon, the dynamic properties of the optical polaron are more pronounced than the ones of the acoustic polaron. This means that optical polaron is more affected by AHTQW than acoustic polaron. Interestingly, the AHTQW can be used to control the stability of polaron, the movement of the electron in the system and the lifetime of both acoustic and optical polaron.