Non-Ohmic transport in the field-induced spin-density-wave state in tetramethyltetraselenafulvalinium chlorate, (TMTSF)2ClO4

A nonlinear transport behavior was observed in the magnetic-field–induced spin-density–wave state above B=7.5 T at T=1.5 K in (TMTSF${)}_2$ ${\mathrm{ClO}}_4$. The nonlinearity appeared in the transverse conductivity, but not in the Hall conductivity. The threshold electric field was very small and undetectable in some samples. The sliding spin-density wave is one of the plausible mechanism of this nonlinear transport. Small-period oscillations with the period Δ(1/B)=0.004 ${\mathrm{T}}^{\mathrm{-}1}$, similar to the Shubnikov–de Haas effect, showed a decrease in amplitude with increasing electric field.