HIGH-TEMPERATURE TRANSPORT OF ELECTRONS IN DIAMOND

The transport parameters of electrons in diamond has been investigated at high temperatures of 500 and 700 K for electric fields ranging fro m 0.4 to 100 kV/cm. It is found that the diffusion coefficient decreas es with increasing temperature and electric fields. The drift velocity at 100 kV/cm decreased from 1.5 x 10(7) to 1.0 x 10(7) cm/s as the te mperature increased from 300 to 700 K. At fields above 50 kV/cm, a non parabolicity factor of 0.25 eV-1 softens excessive heating of the elec trons and the increase in the diffusion coefficient.