2008/06/22 by J. Poltierová Vejpravová, Jana Vejpravová, Vejpravová, J. Poltierová +5
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.0806.3561
4 pages, 4 figures
arxiv created 2008/06/22 · openalex publication_date 2008/06/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/03
UCoGe is reported as a weak ferromagnetic (FM) two-band superconductor (SC) with the critical temperature, TSC∼ 0.7 K and the Curie temperature, TC∼ 3 K at ambient pressure. We report exotic attributes of the SC and FM state in moderate magnetic fields. The observed phenomena clearly demonstrate that the SC regime is superior to the paramagnetic state in the vicinity of TSC. Above TSC, the zero-field state is characterized by a regime with strong FM spin fluctuations, suggesting proximity of the FM quantum critical point (FM-QCP). In addition, we observed that the robust SC regime develops independently on the existence or lack of the long-range FM ordering.