Magneto Acoustic Quantum Oscillations in High Fields and the Fermi Surface of UPt${}_3$

Ludwig Holleis, V. W. Ulrich, B. S. Shivaram

We report magneto-acoustic quantum oscillations (MAQO) in the heavy fermion system UPt${}_3$ in magnetic fields B, upto 33 T. For B in the ab-plane of the hexagonal crystal MAQO in t…