Abstract
The wave-vector (q) and doping dependences of the magnetic energy, iron moment, and effective exchange interactions in LaFeAsO, BaFe2As2, and SrFe2As2 are studied by self-consistent LSDA calculations for co-planar spin spirals. For the undoped compounds, the calculated total energy, E(q), reaches its minimum at q corresponding to stripe anti-ferromagnetic (AF) order. In LaFeAsO, this minimum becomes flat already at low levels of electron-doping and shifts to an incommensurate q at δ=0.2, where δ is the number of additional electrons (δ > 0) or holes (S < 0) per Fe. In BaFe2As2 and SrFe2As2, stripe order remains stable for hole doping down to δ = −0.3. Under electron doping, on the other hand, the E(q) minimum shifts to incommensurate q already at δ=0.1.
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.
