2011/08/31 by Tsendsuren Dulguun, T. Dulguun, Hidekazu Mukuda +9 · 2 citations
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Antiferromagnetism #Band gap #Condensed matter physics #Gapless playback #Intellectual Capital and Performance Analysis #Iron-based superconductors research #Physics #Quasiparticle #Rare-earth and actinide compounds #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.85.144515
published as Phys. Rev. B 85, 144515, (2012) · 6 pages, 5 figures, 1 table
arxiv created 2012/03/19 · openalex publication_date 2012/04/12 · arxiv updated 2014/03/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report 31P-NMR and specific-heat measurements on an iron (Fe) based superconductor SrFe2(As0.65P0.35)2 with Tc=26 K, which have revealed the development of antiferromagnetic correlations in the normal state and unconventional superconductivity (SC) with the nodal gap dominated by the gapless low-lying quasiparticle excitations. The results are consistently argued with an unconventional multiband SC state with the gap-size ratio of different bands being significantly large; the large full gaps in the s_\ifmmode±\else\textpm\fi-wave state keep Tc high, whereas a small gap with a nodal structure causes a gapless feature under magnetic field. The present results will help develop insight into the strong material dependence of the SC gap structure in Fe-based superconductors.