Abstract
Revealing the universal behaviors of iron-based superconductors (FBS) is important to elucidate the microscopic theory of superconductivity. In this work, we investigate the effect of in-plane strain on the slope of the upper critical field Hc2 at the superconducting transition temperature Tc (i.e. −dHc2/dT) for FeSe0.7Te0.3 thin films. The in-plane strain tunes Tc in a broad range, while the composition and disorder are almost unchanged. We show that −dHc2/dT scales linearly with Tc, indicating that FeSe0.7Te0.3 follows the same universal behavior as observed for pnictide FBS. The observed behavior is consistent with a multiband superconductivity paired by interband interaction such as sign change s± superconductivity.
Highlights
September 2018China 2 Institute for Metallic Materials, IFW Dresden, D-01171 Dresden, Germany 3 Institute for Solid State and Materials Physics, TU Dresden, D-01069 Dresden, Germany
The discovery of superconductivity in the iron oxypnictide LaFeAs(O,F) has triggered a surge of research on Fe-based superconductors (FBS) [1,2,3,4]
Kogan et al proposed that the BNC scaling ΔC ∝ Tc3 and −dHc2/dT ∝ Tc is related to an intrinsic pair-breaking in superconductors with strongly anisotropic order parameters, such as FBS [12, 16]
Summary
China 2 Institute for Metallic Materials, IFW Dresden, D-01171 Dresden, Germany 3 Institute for Solid State and Materials Physics, TU Dresden, D-01069 Dresden, Germany. Commons Attribution 3.0 7 National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0047, Japan licence
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
