RESONANCE EFFECT IN MAGNETOTRANSPORT ANISOTROPY OF QUASI-ONE-DIMENSIONAL CONDUCTORS

We propose a Fermi-surface topological effect to describe the magnetotransport anisotropy of a quasi-one-dimensional electron system. When the magnetic field is parallel to one of the interchain lattice vectors having finite effective transfer integrals, the electrons can drift in the field direction with an open-orbit trajectory, causing a resonant increase of the longitudinal conduction. This model is applied to the magnetoresistance anisotropy of the quasi-one-dimensional organic superconductor (tetramethyltetraselenafulvalene)2X.