Influence of Magnetic and Coulomb Fields on Properties of a Strong-CouplingPolaron in a Semiconductor Quantum Dot

The influence of a magnetic field and Coulomb field on the properties of a strong-coupling polaron in a semiconductor quantum dot is studied using the linear combination operator and unitary transformation method.The relations between the vibration frequency and the ground state energy of a strong-coupling bound magnetopolaron in a semiconductor quantum dot with the confinement length of the quantum dot,the Coulomb bound potential,cyclotron resonance frequency of magnetic field,and electron-phonon coupling strength are derived.Numerical calculation results show that the vibration frequency and the ground state energy of the strong-coupling bound magnetopolaron increase strongly with the decreasing confinement length of quantum dot while increase with the increasing cyclotron resonance frequency of magnetic field.The ground state energy of the strong-coupling bound magnetopolaron decreases with the increasing electron-phonon coupling strength and Coulomb bound potential.