Quasi-two-dimensional behavior of 112-type iron-based superconductors
Abstract
Fluctuation magnetoconductivity and magnetization above the superconducting transition temperature (Tc) are measured on the recently discovered 112 family of iron-based superconductors (IBS), Ca1 -xLaxFe1 -yNiyAs2 , which presents an extra As-As chain spacer-layer. The analysis in terms of a generalization of the Lawrence-Doniach approach to finite applied magnetic fields indicates that these compounds are among the most anisotropic IBS (γ up to ∼30 ) and provides compelling evidence of a quasi-two-dimensional behavior for doping levels near the optimal one.
- Publication:
-
Physical Review B
- Pub Date:
- July 2017
- DOI:
- 10.1103/PhysRevB.96.014516
- arXiv:
- arXiv:1707.02470
- Bibcode:
- 2017PhRvB..96a4516S
- Keywords:
-
- Condensed Matter - Superconductivity
- E-Print:
- 10 pages, 9 figures, to appear in PRB