Reconstruction of Fermi surface of (TMTSF)2NO3

Magnetoresistance was investigated for the spin-density-wave state of the organic conductor (TMTSF)2NO3 at ambient pressure and in a tilted magnetic field. The Shubnikov de Haas oscillations were used to calculate the cross-sectional area and to reconstruct the quasi-two-dimensional Fermi surface. We found that the warping of Fermi surface along the c* axis is not symmetric but depends on the azimuthal angle. Furthermore, there was an evidence that the warping is not regular but twisted along the c* axis, that might explain absence of Yamaji-type resonance.*Realizing rotator assembly was supported by the Ewha Research Fund (1994). Part of this his work has also been supported by the KOSEF under grant 96-0702-04-01-3 and the KRF grant for international cooperation.