Free-Electron Screening Mechanism of the Shallow Impurity Breakdown in n-GaAs: Evidences from the Photoelectric Zeeman and Cyclotron Resonance Spectroscopies

Figure 7

Distribution of on neutral donor at and for different impurity potentials (1) Coulomb potential at (noncorrelated case), (2) Coulomb potential at , and (3) screened potential at with . The gradient is given in unit of .