Magnetic field and temperature dependence of the properties of an interface polaron in an arbitrary magnetic field

Abstract

Taking into account the interaction of an electron with both bulk longitudinal-optical (LO) and interface-optical (IO) phonons, we study the magnetic field and temperature dependence of the properties of a magnetopolaron at the interface of polar-polar crystals in an arbitrary magnetic field by using the generalized Larsen perturbation-theory method. The results show that as the temperature increases, the self-trapping of interface magnetopolarons weakens in a weak magnetic field (${\ensuremath{\omega}}_{c}$${\ensuremath{\omega}}_{\mathrm{LO}}$,${\ensuremath{\omega}}_{\mathrm{IO}}$), while it strengthens in a strong magnetic field (${\ensuremath{\omega}}_{c}$>${\ensuremath{\omega}}_{\mathrm{LO}}$,${\ensuremath{\omega}}_{\mathrm{IO}}$). The effect of temperature becomes obvious when ${\ensuremath{\omega}}_{c}$ is close to ${\ensuremath{\omega}}_{\mathrm{LO}}$,${\ensuremath{\omega}}_{\mathrm{IO}}$. The results also show that the farther the electron is from the interface, the more obvious the electron--bulk-LO-phonon interaction changes with the changing of temperature. On the other hand, the nearer the electron from the interface, the more obvious the electron--IO-phonon interaction changes with changing temperature.