The organic one-dimensional conductor (TMTSF)2PF6 exhibits the Peierls transition at TC=12 K, becoming a semiconductor at temperatures below 12K. However, in a sufficiently high hydrostatic pressure, the (TMTSF)2PF6 becomes a two-dimensional superconductor (Tc=1 K). Here we show how the transition temperature to the spin density wave state decreases with increasing pressure. Finally, at p=8 kbar the spin density wave is supressed and the material becomes a superconductor.
Spin density wave TC vs. hidrostatic pressure p of (TMTSF)2PF6. Inset, derivation of resistive (R(T)) curves from which the tranition temperature was extracted.
