1995/06/21 by Yu. S. Barash, Artem V. Galaktionov, A. V. Galaktionov +2 · 2 citations
Mathematics · Physics and Astronomy · #Boundary (topology) #Condensed matter physics #Critical current #Critical field #Engineering physics #Field (mathematics) #Geology #Materials science #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum, superfluid, helium dynamics #Superconductivity #cond-mat
paper · pdf · doi:10.1103/physrevb.52.10344
published in Physical review. B, Condensed matter 52(14), 10344-10358 (American Physical Society) · 29 pages, revtex, figures available upon request
arxiv created 1995/06/21 · openalex publication_date 1995/10/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Boundary conditions for an unconventional superconducting order parameter are obtained on the basis of a microscopic theory. The upper critical field in a superconducting film is examined for unconventional superconductors with a two-component order parameter and is compared with the case of accidental degeneracy. It is shown that for both cases the temperature dependences of the upper critical field in a superconducting film may depend substantially on the quality of boundaries, and under certain conditions have a kink due to the influence of film boundaries. The location of a kink point appears to be dependent on film thickness. If for a massive sample there is another reason for the existence of a kink, the interplay of the reasons may lead to a specific behavior of a kink point location as a function of temperature or film thickness. A test is suggested permitting to distinguish between E1 and E2 types of pairing in a hexagonal superconductor near Tc.