Oscillatory Magnetoresistance in4Hb-TaS2

Abstract

Oscillations with frequencies in the range 0.04 to 3 MG have been observed in the magnetoresistance of $4Hb$-Ta${\mathrm{S}}_2$. The low frequencies observed are consistent with sections of Fermi surface resulting from band folding due to the charge-density-wave superlattice, and the angular dependence of the frequencies suggests cylindrically shaped pieces of the Fermi surface. For particular lead geometries the oscillatory portion of the experimental voltage displays an unusual current dependence in that it scales linearly with $\left|\overline{I}\right|$ but does not depend on the direction of $\overline{I}$.