Thermal fluctuation conductivity and dimensionality in iron-based superconductors

Abstract

The time-dependent Ginzburg-Landau Lawrence-Doniach model is used to investigate the superconducting fluctuation electrical conductivities. The theoretical result based on the self-consistent Gaussian approximation is used to fit the transport measurement data of iron-based superconductors F-doped LaOFeAs and BaFe 2−x Ni x As 2 . We demonstrate that LaOFeAs shows layered behavior, while BaFe 2−x Ni x As 2 is more of a 3D feature. The conductivity in the region near T c is well described by the theoretical formula.

Concurrent intersection point of magnetization and magnetoconductivity curves in strongly fluctuating superconductors

“…The fitting parameters γ, ω, H c2 had been already established in Ref. 28 and are listed in Table I.…”

Anisotropy of Ca0.73La0.27(Fe0.96Co0.04)As2 studied by torque magnetometry*

“…Iron-based superconductors (FeSCs) include several families, such as 1111 family, [1][2][3] 122 family, [4] 111 family, [5] and 112 family. [6] Among them, Ca 1−x La x FeAs 2 (CaLa112) is the first example of FeSCs which crystallizes in a monoclinic lattice with the space group of P21 (No.…”