Decoupling of the superconducting and magnetic/structural phase transitions in electron-doped BaFe2As2
P. C. Canfield, S. L. Bud’ko, Ni Ni, J. Q. Yan, A. Kracher
DOI 10.1103/PhysRevB.80.060501 · Physical Review B
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
Study and comparison of over 30 examples of electron-doped BaFe2As2 for transition metal (TM)=Co, Ni, Cu, and (Co/Cu mixtures) have led to an understanding that the suppression of the structural/antiferromagnetic phase transition to low-enough temperature in these compounds is a necessary condition for superconductivity but not a sufficient one. Whereas the structural/antiferromagnetic transitions are suppressed by the number of TM dopant ions (or changes in the c axis) the superconducting dome exists over a limited range of values of the number of valence electrons added by doping (or values of the a/c ratio). By choosing which combination of dopants is used we can change the relative positions of the upper phase lines and the superconducting dome, even to the extreme limit of suppressing the upper structural and magnetic phase transitions without the stabilization of a lower-temperature superconducting dome.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| 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 |
| Ba(Fe1-xNix)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-x-yCoxCuy)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| LaFeAsO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| BaFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Roles of multiband effects and electron-hole asymmetry in the superconductivity and normal-state properties of Ba(Fe1−xCox)2As2
similarity 0.97Lei Fang et al.
Source status unknown — claims are unverified
Nanoscale superconducting-gap variations and lack of phase separation in optimally doped BaFe1.86Co0.14As2
similarity 0.96F. Massee et al.
Source status unknown — claims are unverified
Co-Substitution Effects on the Fe Valence in the BaFe2As2 Superconducting Compound: A Study of Hard X-Ray Absorption Spectroscopy
similarity 0.96E. M. Bittar et al.
Source status unknown — claims are unverified
Stabilization of s-wave superconductivity through arsenic p-orbital hybridization in electron-doped BaFe2As2
similarity 0.96David W. Tam et al.
Source status unknown — claims are unverified
Transition from antiferromagnetism to superconductivity in the compensated metallic state of Ba1−xKx(Fe1−yCoy)2As2
similarity 0.96Shunpei Suzuki et al.
Source status unknown — claims are unverified
Anisotropy of Electrical Transport in Pnictide Superconductors Studied Using Monte Carlo Simulations of the Spin-Fermion Model
similarity 0.95Shuhua Liang et al.
Source status unknown — claims are unverified