GALVANOMAGNETIC EFFECTS OF N-INSB BELOW 1 K.
Technical rept. no. 2, 1 Nov 64-31 Dec 66,
COLORADO UNIV BOULDER DEPT OF PHYSICS AND ASTROPHYSICS
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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 powercu cm and 7.5 x 10 to the 13th powercu 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 powercu cm and 1.0 x 10th to the 14th powercu 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
- Solid State Physics