Absence of an Appreciable Iron Isotope Effect on the Transition Temperature of the Optimally Doped SmFeAsO1−y Superconductor
Parasharam M. Shirage, Kiichi Miyazawa, Kunihiro Kihou, Hijiri Kito, Yoshiyuki Yoshida, Yasumoto Tanaka, Hiroshi Eisaki, Akira Iyo
DOI 10.1103/PhysRevLett.105.037004 · 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 report the iron (Fe) isotope effect on the transition temperature (Tc) in oxygen-deficient SmFeAsO1−y, a 50-K-class, Fe-based superconductor. For the optimally doped samples with Tc=54 K, a change of the average atomic mass of Fe (MFe) causes a negligibly small shift in Tc, with the Fe isotope coefficient (αFe) as small as −0.024±0.015 (where αFe=−dlnTc/dlnMFe). This result contrasts with the finite, inverse isotope shift observed in optimally doped (Ba,K)Fe2As2, indicating that the contribution of the electron-phonon interaction markedly differs between these two Fe-based high-Tc superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SmFeAsO1-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 54 | Pressure not reported | onset |
| SmFeAsO1-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 54.15 | Pressure not reported | onset |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
| SmFeAs(O,F) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 42 | Pressure not reported | unknown |
| (Ba,K)Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
Similar papers
Absence of an appreciable iron isotope effect on the transition temperature of the optimally doped SmFeAsO_{1-y} superconductor
similarity 0.99Parasharam M. Shirage et al. · 2010 · arXiv:1007.2666
Source status unknown — claims are unverified
Inverse Iron Isotope Effect on the Transition Temperature of the (Ba,K)Fe2As2 Superconductor
similarity 0.98Parasharam M. Shirage et al.
Source status unknown — claims are unverified
High magnetic field superconductivity in a two-band superconductor
similarity 0.96Tancredi Salamone et al.
Source status unknown — claims are unverified
Magnetic and superconducting transitions in Ba1−xKxFe2As2 studied by specific heat
similarity 0.96Ch. Kant et al.
Source status unknown — claims are unverified
Superconducting transition temperature: Interacting Fermi gas and phonon mechanisms in the nonadiabatic regime
similarity 0.96Lev P. Gor'kov
Source status unknown — claims are unverified
Upper and lower critical magnetic fields of superconducting NdFeAsO1−xFx single crystals studied by Hall-probe magnetization and specific heat
similarity 0.96Z. Pribulova et al.
Source status unknown — claims are unverified