Superconductivity and ferromagnetic quantum criticality in uranium compounds

Dai Aoki, Jacques Flouquet

Research output: Contribution to journalReview articlepeer-review

48 Citations (Scopus)

Abstract

We review our recent studies on ferromagnetic superconductors, UGe2, URhGe, and UCoGe, together with the ferromagnetic quantum criticality and paramagnetic singularity on the Ising 5 f-itinerant system UCoAl. Thanks to the variety of ordered moment in ferromagnetic superconductors from 1.5 μB to 0.05 μB, interesting systematic changes or similarities are clarified. All ferromagnetic superconductors show large upper critical field Hc2, and the field-reentrant (-reinforced) phenomena are observed in the field-temperature phase diagram, when the pressure or field direction is tuned for particular conditions. These phenomena are well explained by the ferromagnetic longitudinal fluctuations, which are induced by the magnetic field in transverse configurations. The large Hc2 might be also associated with possible additional effects of Fermi surface instabilities, such as Lifshitz-type singularities.

Original languageEnglish
Article number061011
Journaljournal of the physical society of japan
Volume83
Issue number6
DOIs
Publication statusPublished - 2014 Jun 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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