Shubnikov-de Haas Effect in (TMTSF)₂ClO₄

Abstract

Angular dependence of the transverse magnetoresistance in (TMTSF) 2 ClO 4 was measured in a -plane down to 0.47 K and H up to 13 T. Two types of Shubnikov-de Haas (SdH) oscillations were observed for the angle |θ| between H and c * -axis less than 60 degrees: One with period 0.015 cos θ T -1 , comparable to that found in (TMTSF) 2 PF 6 , and newly observed one with (0.0036 cos θ+0.0002) T -1 . If these correspond to electron- and hole Fermi surfaces respectively, they support the compensated as well as the quasi-two dimensional feature of this organic metal.