Galvanomagnetic Effects of N-InSb Below 1° K

Résumé du livre

Some galvanomagnetic properties of n-InSb have been measured in temperature range from 4K to 0.4K with donor concentrations between 2.6 x 10 to the 15th power/cu cm and 7.5 x 10 to the 13th power/cu cm. The electrical conductivity in zero magnetic field indicated the lack of freezeout for all donor concentrations measured. The transverse magnetoresistance of samples with donor concentrations of 7.5 x 10 to the 13th power/cu cm and 1.0 x 10th to the 14th power/cu cm showed a saturation in magnetic fields less than 10 koe provided the temperature was less than 1K. At temperatures above 1K, the saturation was not observed in any of the samples in magnetic fields up to 16 koe. A possible interpretation of the saturation effect is given by assuming a hydrogen molecule model of the impurities and by taking the dominant scattering mechanism to be due to neutral impurities. (Author).