Electric Field Induced Effects for Two-Electron Quantum Dot in Presence of Magnetic Field

We investigate the electric field induced Rashba coupling effect on spin- and magnetic properties of the system of two interacting electrons confined to a parabolic semiconductor quantum dot. The magnetic field B is applied perpendicularly to the plane of the dot. The total Hamiltonian of the system including Coulomb interaction between the electrons, the external B field and the spin-orbit Rashba coupling is diagonalized using properly constructed basis. The electron correlation is taken into account exactly. The relative motion Schrodinger equation within the effective mass approximation has been solved by power series expansion method. The solutions are utilized for study the mechanism of mixing of two-electron spin states and to demonstrate how fundamental magnetic characteristics of the system reflecting B-field dependence of eigenenergies can be manipulated by means of electric field. Calculations are performed with material parameters of InSb quantum dot.