2011/07/31 by Sudhakar Pandey, Hiroshi Kontani, Dai S. Hirashima +2 · 1 citation
Materials Science · Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Dirac (video compression format) #Doping #Electrical resistivity and conductivity #Electron #Fermi energy #Fermi level #Hall effect #Iron-based superconductors research #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Spin (aerodynamics) #Spin–orbit interaction #Superconductivity #cond-mat.mes-hall #cond-mat.mtrl-sci #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.86.060507
published as Phys. Rev. B 86, 060507 (R) (2012) · 5 pages, 4 figures
arxiv created 2012/08/13 · openalex publication_date 2012/08/13 · arxiv updated 2012/08/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have theoretically explored the intrinsic spin Hall effect (SHE) in the iron-based superconductor family with a variety of materials. The study is motivated by an observation that, in addition to an appreciable spin-orbit coupling in the Fe 3d states, a character of the band structure in which Dirac cones appear below the Fermi energy may play a crucial role in producing a large SHE. Our investigation does indeed predict a substantially large spin Hall conductivity in a heavily hole-doped regime, such as KFe2As2. The magnitude of the SHE has turned out to be comparable with that for Pt despite a relatively small spin-orbit coupling, which we identify as coming from a huge contribution from the gap opening induced by the spin-orbit coupling at the Dirac point, which can become close to the Fermi energy for the heavy hole doping.