2013/12/11 by Wansheng Wang, Wan-Sheng Wang, Wang, Wan-Sheng +4
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.1312.3071
enlarged version, 10 pages, 9 color figures
openalex publication_date 2013/12/11 · arxiv created 2014/09/07 · arxiv updated 2014/09/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We constructed tight-binding models for the new superconductor SrPtAs according to first principle calculations, and by functional renormalization group we investigated the effect of electron correlations and spin-orbital coupling (SOC) in Cooper pairing. We found that out of the five d-orbitals, the (xz,yz)-orbitals are the active ones responsible for superconductivity, and ferromagnetic fluctuations enhanced by the proximity to the van Hove singularity triggers f-wave triplet pairing. The superconducting transition temperature increases as the Fermi level is closer to the van Hove singularity until ferromagnetism sets in. The d-vector of the triplet pairing component is pinned by SOC along the out-of-plane direction. Experimental perspectives are discussed.