Transport Phenomenon of Multilayer Zero-Gap Conductor in the Quantum Limit

Mysterious transport phenomena observed in a zero gap conductor α-(BEDT-TTF) 2 I 3 were investigated. In particular, the electron system in the quantum limit where electrons in the Landau level with index 0 dominate the transport was of interest. In order to determine the magnetic field dependence of the electron transport, we utilized a conductivity tensor. We showed how each component of the conductivity tensor changes with the magnetic field. All the components were found to be expressed by simple functions of magnetic field. Interlayer Hall resistance (Hall effect observed in the interlayer current) was observed for the first time.