A Comparison of Methods for Measurement of the Magnetophonon Effect.

摘要

In experimental studies of the magnetophonon resonance effect, the magnetic field dependence of the second derivative of sample resistance is desired. This is commonly done with a transverse field, and by making two R-C differentiatuons while the field varies with time at a programmed rate. An alternative and less widely used procedure superimposes a small sinusoidal modulating field upon a much larger static field, and makes phase-sensitive detection at the second harmonic frequency. This provides point by point data for the second derivative of resistance. The two methods are compared with reference to data for n-type InSb. (Author)