The organic one-dimensional conductor (TMTSF)2PF6 exhibits Peierls transition at T=12 K, becoming a semiconductor. However, in a sufficiently high hydrostatic pressure, the (TMTSF)2PF6 becomes a two-dimensional superconductor (Tc=1 K). Then again, the magnetic field destroys the superconductivity in this material equally like in all other superconductors and the material has a finite resistance. The beauty of this material is that in this resistive state, quantum phenomena are observed, like the integer quantum Hall effect shown bellow. Additional phenomena can be found too, like the negative (n=-2) Hall plateau.
Hall resistance Rxy vs. magnetic field H of (TMTSF)2PF6. Quantizied Hall plateaus are observed, equally as the negative (n=-2) plateau at H= 11.3 T.
