On Mechanism of Electron Scattering in InP

The Hall mobility of electrons was studied in n‐InP single crystals in the temperature range from 77 to 1000°K at electron concentrations n = 2 × 10 15 to 2 × 10 17 cm −3 and mobilities μ = 3 × 10 3 to 4.3 × 10 4 cm 2 /Vs. The results agree well with calculations for the mixed mechanism of electron scattering on optical phonons, μ 0 = (100/√ T )(exp(500/ T ) −1), and acoustic phonons, μ a = 6.53 × 10 7 T −3/2 cm 2 /Vs (the deformation potential is assumed to be equal to 21 eV). Scattering on ions and neutral impurity atoms is important in specimens with n > 5 × 10 15 cm −3 at low temperatures. The concentration of neutral impurity atoms does not exceed 10 14 cm −3 in pure specimens, while in specimens with n > 10 16 cm −3 N N reaches the value of 10 16 cm −3 and more. The results of the Hall coefficient dependence on the magnetic field strength (0.3 to 20 kOe) at 77 and 300 °K show that the Hall factor A ( R = A/nec ) approximates 1 in all the specimens with the exception of pure specimens where A ≈ 1.13 at 77 °K. These results agree well with the conclusions drawn from the analysis of temperature and concentration dependences of mobility.