2016/03/19 by М. А. Силаев, Mikhail Silaev
Materials Science · Mathematics · Physics and Astronomy · #Condensed matter physics #Critical field #Field (mathematics) #Impurity #Iron-based superconductors research #Magnetic field #Magnetization #Mathematics #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Scattering #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.93.214509
published as Phys. Rev. B 93, 214509 (2016)
arxiv created 2016/03/19 · openalex publication_date 2016/06/16 · arxiv updated 2016/06/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Magnetic properties of dirty multiband superconductors near the upper critical field are studied. The parameter \ensuremathκ2 characterizing magnetization slope is shown to have a significant temperature variation which is quite sensitive to the pairing interactions and relative strengths of intraband impurity scattering. In contrast to single-band superconductors the increase of \ensuremathκ2 at low temperatures can be arbitrarily large determined by the ratio of maximal and minimal diffusion coefficients in different bands. Temperature dependencies of \ensuremathκ2(T) in two-band MgB2 and iron-based superconductors are shown to be much more sensitive to the multiband effects than the upper critical field Hc2(T).