Abstract
Magnetothermal and Shubnikov – de Haas oscillations were observed in arsenic. The periods of the oscillations are in agreement with those from recent de Haas – van Alphen experiments that support the Lin–Falicov model of the arsenic Fermi surface. The ratio of oscillatory and non-oscillatory resistivities is of the magnitude predicted by Adams–Holstein theory. It is shown that, for the same sample material, the Dingle temperature of the Shubnikov – de Haas effect is larger than the corresponding temperature of the de Haas – van Alphen effect. The long-period oscillation is not observed in the Shubnikov – de Haas effect. Factors that could attenuate the long-period oscillation are considered. Variations in temperature in the magnetothermal effect are compared to calculated values determined from the amplitude of the de Haas – van Alphen torque oscillations.
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