Анотація:
We point out that measurements of a phase of the de Haas–van Alphen oscillations can give information
on a degeneracy of electron-energy bands in a metal even though this degeneracy occurs far away from its
Fermi level. As an illustration of this statement, the published experimental data on the de Haas–van Alphen
effect in LaRhIn₅, graphite, and zinc are discussed.