Fermi Surface of Thallium from Magnetoacoustic Measurements

Abstract

Magnetoacoustic measurements, at frequencies up to 270 Mc/sec, have been made on single-crystal specimens of thallium. From the observed oscillatory behavior, the extremal dimensions of the Fermi surface have been obtained. These dimensions agree quite closely with the predictions of the free-electron model, assuming a single-zone scheme to take into account the effects of spin-orbit splitting. No unequivocal effects due to magnetic breakdown have been observed.