Semi-classical theory of magnetic quantum oscillations in a two-dimensional multiband canonical Fermi liquid

2006-04-03T11:32:10Z (GMT) by A.S. Alexandrov A.M. Bratkovsky
The semi-classical Lifshitz-Kosevich (LK) description of quantum oscillations is extended to a multiband two-dimensional Fermi liquid with a constant number of electrons. The amplitudes of novel oscillations with combination frequencies, recently predicted and observed experimentally, are analytically derived and compared with the single-band amplitudes. The combination amplitudes decay with temperature exponentially faster than the standard harmonics, and this provides a valuable tool for their experimental identification.