n 1979, the first organic superconductor, (TMTSF)2PF6, was discovered.
The superconducting state of this quasi-1d material emerges only upon
suppression of an ambient pressure spin-density wave ground state. As
for more recently found superconductors proximate to a magnetic phase,
there are clear signatures for spin fluctuations in the normal state.
Further, the normal state properties have been interpreted in the
context of a quantum critical point associated with the magnetic order,
though there are important deviations from the standard scenario.
Finally, the preponderance of evidence points to an order parameter
consistent with pairing mediated by spin fluctuations.
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