Combination quantum oscillations in canonical single-band Fermi liquids

Chemical potential oscillations mix individual-band frequencies of the de Haas–van Alphen and Shubnikov–de Haas magnetooscillations in canonical low-dimensional multiband Fermi liquids. We predict a similar mixing in canonical single-band Fermi liquids, which Fermi surfaces have two or more extremal cross sections. Combination harmonics are analyzed using a single-band almost two-dimensional energy spectrum. We outline some experimental conditions allowing for resolution of combination harmonics.