High field Hall effect in (DMET-TSeF)2AuCl2

The Hall effect of the quasi one-dimensional system (DMET-TSeF)2AuCl2 is reported at high fields where the system is in the FISDW (Field Induced Spin Density Wave) state. The Hall voltage shows similar but different behavior to those observed in the famous TMTSF system. The Hall voltages show step like behavior, but they are not clearly quantized. The voltage disappears above 18 T, and not the inverses of the FISDW boundary fields but the squares of them seem to show linear dependence to the phase indices n. The absolute values of the Hall voltages at the corresponding phase indices are about one tenth of the values observed in TMTSF system. Moving FISDW states have been proposed to understand the differences.