THE ROLE OF SURFACE TREATMENT IN THE FIELD EFFECT ANOMALY OF N-TYPE INSB AT HIGH MAGNETIC FIELDS.
MASSACHUSETTS INST OF TECH CAMBRIDGE
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By applying a magnetic field perpendicular to the surface of n-type InSb during a classical field effect experiment, a decrease in surface conductance was observed as contrasted to the expected field effect increase in conductance. This anomaly in the field effect was found in the case of cleaved 110 as well as etched 111 surfaces at 77K both in vacuum or immersed in liquid nitrogen. In the case of the 110 surfaces the anomaly was also observed at 4.2K in vacuum but not when they were immersed in liquid helium. The anomaly was not present at 4.2K in the case of 111 surfaces either in vacuum or when they were immersed in liquid helium. The results are explained on the basis of cross quantization of the kinetic energy of the electrons by the narrow surface space charge potential barrier normal to the surface and the magnetic orbital quantization on a plane parallel to the surface. The symbol is used here to indicate brackets. Author
- Electricity and Magnetism
- Solid State Physics