Dynamic Longitudinal Conductivity of a Magnetic Two-Dimensional Electron with Rashba Spin-orbit coupling in the Presence of Electron-Electron Interaction

We investigate the effects of the electron-electron interaction on the intrinsic longitudinal conductivity in a magnetic two-dimensional electron gas with Rashba spin-orbit coupling. The breakdown of Galilean invariance in this system enhances the effects of electron-electron interaction. In the clean system or high-frequency limit, the longitudinal conductivity is obtained in terms of the spin-spin response functions. Here, we considered the electron-electron interaction effects within the Hubbard approximation for the local field factor, which is beyond the random phase approximation, then obtained the intrinsic longitudinal conductivity. We show that the intrinsic longitudinal conductivity increases with increasing interaction strength in two-band regimes.

کلیدواژه ها:

Longitudinal Conductivity ، linear response theory ، random phase approximation ، Hubbard approximation