2008/10/17 by Zhicheng Zhong, Zhong, Zhicheng, Qinfang Zhang +6
Business, Management and Accounting · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Intellectual Capital and Performance Analysis #Iron-based superconductors research #Materials Science (cond-mat.mtrl-sci) #Superconductivity (cond-mat.supr-con) #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.0810.3246
arxiv created 2008/10/17 · openalex publication_date 2008/10/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The recently discovered high-temperature superconductivity in doped quaternary iron oxypnictides correlates experimentally with a magnetic instability. We have used first-principles calculations to determine a magnetic phase diagram of ReO1-δFeAs (Re=La--Dy) as a function of the doping δ, of the FeAs in-plane lattice constant a, and of the distance between the Fe and As planes, that is qualitatively consistent with recent experimental findings on the doping, internal (chemical) and external pressure dependence. The existence of a tricritical point (TCP) in the phase diagram suggests new ways of enhancing Tc.