Theoretical study of correlation between spin fluctuations and Tc in isovalent-doped 1111 iron-based superconductors
Hayato Arai, Hidetomo Usui, Katsuhiro Suzuki, Yuki Fuseya, Kazuhiko Kuroki
DOI 10.1103/PhysRevB.91.134511 · 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
Motivated by recent experiments on isovalent-doped 1111 iron-based superconductors LaFeAs1−xPxO1−yFy and the theoretical study that followed, we investigate, within the five-orbital model, the correlation between spin fluctuations and the superconducting transition temperature, which exhibits a double-dome feature upon varying the Fe-As-Fe bond angle. Around the first dome with higher Tc, the low-energy spin fluctuation and Tc are not tightly correlated because the finite-energy spin fluctuation also contributes to superconductivity. On the other hand, the strength of the low-energy spin fluctuation originating from the dxz/yz orbital is correlated with Tc in the second dome with lower Tc. These calculation results are consistent with a recent NMR study, and hence strongly suggest that the pairing in iron-based superconductors is predominantly caused by multiorbital spin fluctuations.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFeAs1-xPxO1-yFy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La0.05Y0.95FeAsO1-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 50 | Pressure not reported | onset |
Similar papers
Change of Fermi surface states related with two different Tc-raising mechanisms in iron pnictide superconductors
similarity 0.96A. Takemori et al.
Source status unknown — claims are unverified
Ising and spin orders in the iron-based superconductors
similarity 0.95Cenke Xu et al.
Source status unknown — claims are unverified
Enhancement of Tc by disorder in underdoped iron pnictide superconductors
similarity 0.95R. M. Fernandes et al.
Source status unknown — claims are unverified
Model of the Electronic Structure of Electron-Doped Iron-Based Superconductors: Evidence for Enhanced Spin Fluctuations by Diagonal Electron Hopping
similarity 0.95Katsuhiro Suzuki et al.
Source status unknown — claims are unverified
Zn-impurity effect and interplay of s± and s++ pairings in iron-based superconductors
similarity 0.95Zi-Jian Yao et al.
Source status unknown — claims are unverified
Improper s-wave symmetry of the electronic pairing in iron-based superconductors by first-principles calculations
similarity 0.95M. Casula & S. Sorella
Source status unknown — claims are unverified