de Haas—van Alphen Effect and Fermi Surface in Rhenium

The de Haas-van Alphen effect in rhenium has been studied by a null-deflection torsion balance technique in magnetic fields up to 40 kG. It is shown that a set of ellipsoids and a set of dumbbell-like Fermi surface segments located on the $A-L$ symmetry line of the reduced Brillouin zone can account for most of the observed data. de Haas-van Alphen oscillations associated with magnetic breakdown phenomena provide evidence in support of the above model. This model furthermore requires that there be a degeneracy in the energy spectrum along the $A-L$ line, as predicted by group theory.