R. K. W. Haselwimmer

TL;DR: The observation of superconductivity on the border of ferromagnetism in a pure system, UGe 2, which is known to be qualitatively similar to the classic d-electron ferromagnets, is reported.

TL;DR: In this article, the authors show that nonmagnetic impurities destroy superconductivity when the residual resistivity exceeds the superconducting coherence length, i.e., when the carrier mean free path falls below the supercondensing length.

TL;DR: In this article, a superconducting phase was observed in the itinerant electron ferromagnet UGe 2, where the superconductivity was observed below 1 K and in a limited pressure range immediately below the critical pressure where ferromagnetic properties are abruptly suppressed.

TL;DR: Using the Shubnikov-de Haas effect, it is found that the Fermi surface sheet believed to be primarily responsible for superconductivity becomes more two-dimensional with increasing pressure, a surprising result that is, however, consistent with a recent model of orbital-dependentsuperconductivity in this system.

TL;DR: The anomalous power-law dependence is surprisingly stable over extended ranges in temperature and pressure and challenges current theory of magnetic quantum phase transitions as discussed by the authors, showing that this strange metallic phase is connected to the proximity of an antiferromagnetic quantum critical point as in the isoelectronic relative CeNi2Ge2 near 2.8 GPa.