Properties Of Magnetopolaron Research Articles

Cumulative effects of temperature, magnetic field and spin orbit interaction (SOI) on the properties of magnetopolaron in RbCl quantum well

In this work, we investigate the cumulative effects of temperature, spin orbit interaction (SOI) and the magnetic field on properties of the magnetopolaron in RbCl quantum well. The Ground state binding energy (GSBE) of the magnetopolaron in RbCl QW is evaluated using the Lee Low Pine Unitary transformation (LLPUT) and the combination operation method. Numerical results show that, in addition to temperature, the spin orbit interaction affects considerably the GSBE of the magnetopolaron. Also, the transition behavior at threshold values of the temperature as well as the cyclotron frequency is considered. This study reveals that the spin orbit interaction cannot be neglected during the investigation of the nanostructure system.

Study of the properties of strong-coupling magnetopolaron in quantum disks induced by the Rashba spin-orbit interaction

On the basis of Lee-Low-Pines unitary transformation, the properties of strong-coupling magnetopolarons in quantum disks (QDs) induced by the Rashba spin-orbit interaction are studied using the Tokuda improved linearly combined operator method. Results show that the state properties of magnetopolarons are closely linked with the sign of the interaction energy Eint, and the Eint of magnetopolarons changes with the transverse confinement strength 0, the cyclotron frequency of the external magnetic field c, the electron-LO phonon coupling strength , and the thickness L of QDs. The average number N of phonons increases with increasing c, 0 and , but the oscillation decreases with increasing thickness L of QDs. The effective mass m0* of magnetopolarons splits into two (m+*, m-*), induced by the Rashba spin-orbit interaction, and the values of them increase with increasing c, 0 and , but the oscillation decreases with increasing thickness L of QDs. For the ground state of magnetopolarons in QDs, the electron-LO phonon interaction plays a significant role, meanwhile, the Rashba spin-orbit coupling effect cannot be ignored. Only for the lower volocity of the electrons, can the polaron effect and the Rashba spin-orbit interaction effect on the magnetopolaron be obvious.

Magnetic field and temperature dependence of the properties of the magnetopolaron in an asymmetric quantum dot

The influence of the magnetic field and temperature on the properties of the strong-coupling magnetopolaron in an asymmetric quantum dot is studied by using the Tokuda’s linear-combination operator and the Lee-Low-Pines variational method. The expressions for the vibration frequency λ, ground state energy E0 and the effective mass m* of the magnetopolaron as a function of the transverse effective confinement strength ω1, the longitudinal effective confinement strength ω2, the electron-phonon coupling strength α, the cyclotron frequency ωc and the temperature parameter γ are derived. Numerical results indicate that λ and m* of the magnetopolaron will increase with increasing ω1,ω2,ωc and α, and will decrease with increasing temperature T. The value of E0 changing with ω1,ω2,ωc,α and γ are srongly related to the propties of the state of the magnetopolaron. The signs of positeve and negative E0 relate not only to the value of ω1,ω2,ωc and α but also to the value of γ. However, only on the condition of higher temperature (γλ,m* and E0 of the magnetopolaron is obvious.