2014/12/23 by Saurabh Maiti, Manfred Sigrist, Andrey V. Chubukov +1 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Algorithm #Computer science #Iron-based superconductors research #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.91.161102
4 figs, 4+5 pages
arxiv created 2014/12/23 · openalex publication_date 2015/04/13 · arxiv updated 2015/06/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We analyze the s+is state that is proposed as a candidate superconducting state for strongly hole-doped Ba_1\ensuremath-xKxFe2As2. Such a state breaks time-reversal symmetry (TRS) but does not break any other discrete symmetry. We address the issue as to whether TRS breaking alone can generate spontaneous currents near impurity sites, which could be detected in, e.g., muon spin relaxation experiments. We argue that there are no spontaneous currents if only TRS is broken. However, supercurrents do emerge if the system is put under external strain and C4 lattice rotation symmetry is externally broken.