A recent preprint from Ni, Thaler, Kracher, Yan, Budko, and Canfield (Ames Lab, Iowa State) reports the above phase diagram for members of the 122 family (based on the parent compound BaFe2As2). When doped with transition metals the antiferromagnetic transition is suppressed and superconductivity appears below the lower dome. Near the antiferromagnetic transition there is also a structural transition from a tetragonal to an orthorhombic crystal structure.
Tuesday, June 16, 2009
A universal (almost) phase diagram for iron pnictide superconductors
A recent preprint from Ni, Thaler, Kracher, Yan, Budko, and Canfield (Ames Lab, Iowa State) reports the above phase diagram for members of the 122 family (based on the parent compound BaFe2As2). When doped with transition metals the antiferromagnetic transition is suppressed and superconductivity appears below the lower dome. Near the antiferromagnetic transition there is also a structural transition from a tetragonal to an orthorhombic crystal structure.
Subscribe to:
Post Comments (Atom)
Characteristics of static disorder can emerge from electron-phonon interactions
Electronic systems with large amounts of static disorder can exhibit distinct properties, including localisation of electronic states and su...
-
Is it something to do with breakdown of the Born-Oppenheimer approximation? In molecular spectroscopy you occasionally hear this term thro... -
I welcome discussion on this point. I don't think it is as sensitive or as important a topic as the author order on papers. With rega...
-
If you look on the arXiv and in Nature journals there is a continuing stream of people claiming to observe superconductivity in some new mat...
It is probably worth pointing out that something similar has already appeared in PRB for SrBa2As2: S. R. Saha, et. al. PRB 79, 224519 (2009), Fig. 9.
ReplyDelete