What Controls the Phase Diagram and Superconductivity in Ru-Substituted BaFe2As2?
R. S. Dhaka, Chang Liu, R. M. Fernandes, Rui Jiang, C. P. Strehlow, Takeshi Kondo, A. Thaler, Jörg Schmalian, S. L. Bud’ko, P. C. Canfield, Adam Kaminski
DOI 10.1103/PhysRevLett.107.267002 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We use high resolution angle-resolved photoemission to study the electronic structure of the iron based high-temperature superconductors Ba(Fe1−xRux)2As2 as a function of Ru concentration. We find that substitution of Ru for Fe is isoelectronic, i.e., it does not change the value of the chemical potential. More interestingly, there are no measured, significant changes in the shape of the Fermi surface or in the Fermi velocity over a wide range of substitution levels (0<x<0.55). Given that the suppression of the antiferromagnetic and structural phase is associated with the emergence of the superconducting state, Ru substitution must achieve this via a mechanism that does not involve changes of the Fermi surface. We speculate that this mechanism relies on magnetic dilution which leads to the reduction of the effective Stoner enhancement.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba(Fe1-xRux)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba(Fe1-xCox)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Disorder effects in multiorbital s±-wave superconductors: Implications for Zn-doped BaFe2As2 compounds
similarity 0.95Hua Chen et al.
Source status unknown — claims are unverified
Electron-doping evolution of the low-energy spin excitations in the iron arsenide superconductor BaFe2−xNixAs2
similarity 0.95Miaoyin Wang et al.
Source status unknown — claims are unverified
Do Transition-Metal Substitutions Dope Carriers in Iron-Based Superconductors?
similarity 0.95Tom Berlijn et al.
Source status unknown — claims are unverified
Phase transition beneath the superconducting dome in BaFe2(As1−xPx)2
similarity 0.95Debanjan Chowdhury et al.
Source status unknown — claims are unverified
Statistics of the subgap states of s± superconductors
similarity 0.94A. Glatz & A. E. Koshelev
Source status unknown — claims are unverified
Anisotropic quasiparticle lifetimes in Fe-based superconductors
similarity 0.94A. F. Kemper et al.
Source status unknown — claims are unverified