Light-response spectrum of a p-n junction of rediffused InSb in a magnetic field

The effect of a magnetic field (0–18 kG) on the spectral distribution of the photocurrent of p-n junctions obtained by the heat treatment of n-InSb in a vacuum is investigated. The reduced effective mass m*/m0=0.014 and the g-factor of the electrons (g=−50) are found from the spectral fluctuations of the photocurrent. A suggestion is advanced as to the exciton nature of the long-wavelength (LW) shift of the limit of the light response when the magnetic field is turned on. It has been established that the short-wavelength (SW) sensitivity is produced by photoelectrons of the p-layer and the sensitivity in the region of the LW limit is produced by photovacancies of the n-region.