Acoustic quantum oscillations and the fermi surfaces of cadmium and zinc

Abstract
Quantum oscillations have been observed in the absorption of longitudinal ultrasonic waves of frequencies 70 and 170 MHZ by single crystals of Cd and Zn at about 1·1°K in magnetic fields from 15 to 65 koe. Pulsed ultrasonics have been combined with low-field modulation and phase sensitive detection. The results are discussed in terms of the Fermi surfaces of the metals, and difficulties arise in the interpretation of certain frequencies in terms of current models.