Rare earth ion size dependence of the T<inf>c</inf>of the "RE-123" HTSC within the (d + s)-wave description of their superconducting state

I. M. TangT. OsotchanS. LeelapruteMahidol UniversityThe Institute of Science and Technology for Research and Development, Mahidol University2018-07-042018-07-041998-01-01Physics Letters, Section A: General, Atomic and Solid State Physics. Vol.244, No.5 (1998), 442-448037596012-s2.0-0043047266https://repository.li.mahidol.ac.th/handle/20.500.14594/18640The dependence of the Tc's on the radius of the rare earth ions in the rare earth "123" high temperature superconductors (HTSC) is explained within the framework of a (d + s)-wave model of superconductivity. The appearance of a s-wave symmetry component in the order parameter of a spin fluctuation mediated d-wave superconductor is taken to be due to the orthorhombic distortion which occurs in these HTSC. It is assumed that the structural (orthorhombic) distortion induces a corresponding anisotropy in the pairing interaction, resulting in a nonseparable anisotropic interaction. It is shown that the Tc's are affected by the orthorhombic distortion which in turn is observed to depend on the size of the RE ions. © 1998 Elsevier Science B.V.Mahidol UniversityPhysics and AstronomyRare earth ion size dependence of the T<inf>c</inf>of the "RE-123" HTSC within the (d + s)-wave description of their superconducting stateArticleSCOPUS10.1016/S0375-9601(98)00331-4