Angular dependence of nonclassical magnetic quantum oscillations in a quasitwodimensional multiband Fermi liquid with impurities
Abstract
The semiclassical LifshitzKosevichtype description is given for the angular dependence of quantum oscillations with combination frequencies in a multiband quasitwodimensional Fermi liquid with a constant number of electrons. The analytical expressions are found for the Dingle, thermal, spin, and amplitude (Yamaji) reduction factors of the nonclassical combination harmonics, where the latter two strongly oscillate with the direction of the field. At the ``magic'' angles those factors reduce to the purely twodimensional expressions given earlier. The combination harmonics are suppressed in the presence of the nonquantized (``background'') states, and they decay exponentially faster with temperature and/or disorder compared to the standard harmonics, providing an additional tool for electronic structure determination. The theory is applied to Sr_{2}RuO_{4}.
 Publication:

Physical Review B
 Pub Date:
 January 2002
 DOI:
 10.1103/PhysRevB.65.035418
 arXiv:
 arXiv:condmat/0104520
 Bibcode:
 2002PhRvB..65c5418B
 Keywords:

 71.18.+y;
 71.27.+a;
 73.21.b;
 73.90.+f;
 Fermi surface: calculations and measurements;
 effective mass g factor;
 Strongly correlated electron systems;
 heavy fermions;
 Electron states and collective excitations in multilayers quantum wells mesoscopic and nanoscale systems;
 Other topics in electronic structure and electrical properties of surfaces interfaces thin films and lowdimensional structures;
 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 5 pages, 2 figures, minor typos corrected