Fermiology, orbital order, orbital fluctuations, and Cooper pairing in iron-based superconductors
Fan Yang, Fa Wang, Dung-Hai Lee
DOI 10.1103/PhysRevB.88.100504 · 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
We address two important issues that arise in recent studies of iron-based superconductivity. (1) Why are the Tc of AxFe2−ySe2 (A=K, Rb, Cs) and the single unit cell FeSe on SrTiO3 so high despite both only having electron pockets? (2) What (if any) are the effects of orbital order and orbital fluctuation on the Cooper pairing. Our main conclusions are the following: (1) removing hole pockets releases frustration of Cooper pairing from their band vorticity, therefore can enhance Tc, and (2) orbital fluctuation has negligible effect on Cooper pairing.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| AxFe2-ySe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 48 | Pressure not reported | unknown |
| FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 65 | Pressure not reported | unknown |
Similar papers
Electron pairing in the presence of incipient bands in iron-based superconductors
similarity 0.96Xiao Chen et al.
Source status unknown — claims are unverified
Isotropic Cooper pairs with emergent sign changes in a single-layer iron superconductor
similarity 0.95J. P. Rodriguez
Source status unknown — claims are unverified
Coexistence of Replica Bands and Superconductivity in FeSe Monolayer Films
similarity 0.95S. N. Rebec et al.
Source status unknown — claims are unverified
Ultrafast Dynamics Evidence of High Temperature Superconductivity in Single Unit Cell FeSe on SrTiO3
similarity 0.95Y. C. Tian et al.
Source status unknown — claims are unverified
Superconductivity in FeSe Thin Films Driven by the Interplay between Nematic Fluctuations and Spin-Orbit Coupling
similarity 0.95Jian Kang & Rafael M. Fernandes
Source status unknown — claims are unverified
Role of SrTiO3 phonon penetrating into thin FeSe films in the enhancement of superconductivity
similarity 0.94Shuyuan Zhang et al.
Source status unknown — claims are unverified