2009/09/16 by Chang-Youn Moon, Hyoung Joon Choi · 2 citations
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Chalcogen #Chalcogenide #Condensed matter physics #Corporate Taxation and Avoidance #Ferromagnetism #Iron-based superconductors research #Magnetism #Materials science #Order (exchange) #Phase (matter) #Physics #Pnictogen #Quantum mechanics #Superconductivity #Superexchange #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.104.057003
published as Phys. Rev. Lett. 104, 057003 (2010). · 4 pages, 4 figures
arxiv created 2009/09/16 · openalex publication_date 2010/02/03 · arxiv updated 2015/05/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Magnetic properties of iron chalcogenide superconducting materials are investigated using density-functional calculations. We find that the stability of magnetic phases is very sensitive to the height of chalcogen species from the Fe plane: while FeTe with optimized Te height has the double-stripe (pi, 0) magnetic ordering, the single-stripe (pi, pi) ordering becomes the ground state when Te is lowered below a critical height by, e.g., Se doping. This behavior is understood by opposite Te-height dependences of the superexchange interaction and a longer range magnetic interaction mediated by itinerant electrons. We also demonstrate a linear temperature dependence of the macroscopic magnetic susceptibility in the single-stripe phase in contrast with the constant behavior in the double-stripe phase. Our findings provide a comprehensive and unified view on the magnetism in FeSexTe1-x and iron pnictide superconductors.