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Using controlled disorder to distinguish and gap structure in Fe-based superconductors
Y. Wang, A. Kreisel, P. J. Hirschfeld +1
We reconsider the effect of disorder on the properties of a superconductor characterized by a sign-changing order parameter appropriate for Fe-based materials. Within a simple two…
Effects of disordered Ru substitution in BaFeAs: Realization of superdiffusion mechanism in real materials
Limin Wang, Tom Berlijn, Yan Wang +3
An unexpected insensitivity of the Fermi surface to impurity scattering is found in Ru substituted BaFeAs from first-principles theory, offering a natural explanation of th…
Spin excitations in layered antiferromagnetic metals and superconductors
W. Rowe, J. Knolle, I. Eremin +1
The proximity of antiferromagnetic order in high-temperature superconducting materials is considered a possible clue to the electronic excitations which form superconducting pairs.…
Specific Heat To Hc2: Evidence for Nodes or Deep Minima in the Superconducting Gap of Under- and Overdoped Ba(Fe1-xCox)2As2
J. S. Kim, B. D. Faeth, Y. Wang +7
Low temperature specific heat, C, in magnetic fields up to Hc2 is reported for underdoped Ba(Fe0.955Co0.045)2As2 (Tc=8 K) and for three overdoped samples Ba(Fe1-xCox)2As2 (x=0.103,…
Evolution of the neutron resonances in AFe2Se2
T. A. Maier, P. J. Hirschfeld, D. J. Scalapino
Recent experiments on the alkali-intercalated iron selenides have raised questions about the symmetry of the superconducting phase. Random phase approximation calculations of the l…
Modulations of the local pairing interaction near magnetic impurities in d-wave superconductors
A. T. Roemer, S. Graser, P. J. Hirschfeld +1
The spin-fluctuation based pairing mechanism has proven successful in explaining the pairing symmetries due to Fermi surface nesting of both cuprates and iron-based materials. In t…