Extremely Strong Dependence of Superconductivity on Disorder in
AP Mackenzie, RKW Haselwimmer, AW Tyler… - Physical review …, 1998 - APS
AP Mackenzie, RKW Haselwimmer, AW Tyler, GG Lonzarich, Y Mori, S Nishizaki, Y Maeno
Physical review letters, 1998•APSA key signature of unconventional or non-s-wave superconductivity is a strong suppression
of T c by nonmagnetic as well as by magnetic impurities. We report measurements of
chemical composition and of transport properties in the same single crystals of Sr 2 RuO 4
which show that nonmagnetic impurities destroy superconductivity when the residual
resistivity exceeds 1 μ Ω cm, ie, when the carrier mean free path falls below the
superconducting coherence length. This behavior strongly supports models of non-s-wave …
of T c by nonmagnetic as well as by magnetic impurities. We report measurements of
chemical composition and of transport properties in the same single crystals of Sr 2 RuO 4
which show that nonmagnetic impurities destroy superconductivity when the residual
resistivity exceeds 1 μ Ω cm, ie, when the carrier mean free path falls below the
superconducting coherence length. This behavior strongly supports models of non-s-wave …
Abstract
A key signature of unconventional or non-s-wave superconductivity is a strong suppression of T c by nonmagnetic as well as by magnetic impurities. We report measurements of chemical composition and of transport properties in the same single crystals of Sr 2 RuO 4 which show that nonmagnetic impurities destroy superconductivity when the residual resistivity exceeds 1 μ Ω cm, ie, when the carrier mean free path falls below the superconducting coherence length. This behavior strongly supports models of non-s-wave (eg, p-or d-wave) pairing in this layered perovskite oxide.
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