2021/07/14 by N. B. Bolotina, Н. Б. Болотина, О.Н. Хрыкина +9
Materials Science · Mathematics · Physics and Astronomy · #Algorithm #Charge (physics) #Checkerboard #Geometry #Iron-based superconductors research #Mathematics #Physics #Quantum mechanics #Rare-earth and actinide compounds #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.105.054511
12 pages including 4 figures and 2 tables
arxiv created 2021/07/14 · openalex created_date 2021/07/19 · openalex publication_date 2022/02/15 · arxiv updated 2022/03/02 · openalex updated_date 2026/08/05
Inhomogeneous superconductivity in the high quality single crystals of ZrB12 (Tc = 6 K) has been studied using the heat capacity and x-ray diffraction (XRD) data. Evidence of two-band superconductivity with two branches of upper critical field Hc2(Tc) is obtained in a magnetic field applied along the [110] axis of the crystal. On the contrary, at H //[100], the only dependence Hc2(Tc) is observed. This finding is supplemented with the checkerboard-type patterns of the charge stripes in ZrB12 deduced from the detailed analysis of XRD data. These patterns are compared to the structure of the charge stripes in the weakly bound superconductor LuB12, whose Tc is 15 times lower than that of ZrB12. Probable nature of the two-gap superconductivity in ZrB12 with strongly enhanced characteristics is discussed.