Magnetothermal oscillations in a two-dimensional electron system

Abstract

An adiabatic variation of a strong magnetic field is expected to cause significant temperature oscillations in an ideal two-dimensional electron system at low temperatures. When plotted against epsilon 0/ mu BH, these oscillations have a definite period Delta ( epsilon 0/MBH)=2 where epsilon 0 is the ideal Fermi energy in the absence of magnetic field and mu BH is the field energy. The nodes appear when epsilon 0/ mu BH is close to odd integers. These features indicate that the effective Bohr magneton may be determined experimentally. The oscillations are estimated and illustrated for typical choices of parameters suitable to Si inversion layer electrons and compared with the three-dimensional case.