Superconductivity in Zr-Doped NbSe₃

Abstract

The electrical resistivity of NbSe₃ doped with Zr was measured. While pure NbSe₃ remained normal above 1.2 K, a two-stage decrease of the resistivity was observed in doped crystals below 3 K attributable to the onset of superconductivity. We conclude that CDW suppresses superconductivity in the pure limit by some unknown mechanism.