Influence of Rashba spin-orbit interaction on the effective mass of bound polaron in an anisotropic quantum dot

The effective mass of bound polaron in an anisotropic quantum dot is calculated by using improved linear combination operator method. Under the influence of Rashba spin-orbit interaction, the effective mass of the polaron splits into two branches on the basis of zero spin. The effective mass of bound polaron is an increase function of electron-phonon coupling strength and Coulomb bound potential strength, and a decreasing function of velocity, transverse and longitudinal confinement lengths. The relations between the spin splitting effective mass and the velocity, transverse confinement length, longitudinal confinement length, electron-phonon coupling strength and Coulomb bound potential strength are also studied by us. Due to the heavy hole characteristics, the spin splitting effective mass is negative. (author)