Spin dephasing induced by inhomogeneous broadening in D'yakonov-Perel' effect in a n-doped GaAs quantum well

A spin dephasing mechanism due to the inhomogeneous broadening in the D'yakonov-Perel' (DP) effect, which was totally overlooked in the literature, is calculated by solving the kinetic Bloch equations. The dephasing time calculated from this many-body study is markedly smaller than that calculated from the old formulism of the DP effect. The difference is attributed to the additional spin dephasing mechanism.