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

Figure 6

Shape of the line, determined by the quadratic Stark effect at , , , , for different impurity potentials: (1) ; (2) ; (3) ; (4) ; and (5) Coulomb potential. is given in unit of .