In-gap bound states induced by a single nonmagnetic impurity in sign-preserving s-wave superconductors with incipient bands
Yi Gao (高绎), Yan Yu (虞妍), Tao Zhou (周涛), Huaixiang Huang (黄怀湘), Qiang-Hua Wang (王强华)
DOI 10.1103/PhysRevB.96.220507 · 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 have investigated the in-gap bound states (IGBS) induced by a single nonmagnetic impurity in multiband superconductors with incipient bands. Contrary to the naive expectation, we found that even if the superconducting (SC) order parameter is a sign-preserving s wave on the Fermi surfaces, the incipient bands may still affect the appearance and locations of the IGBS, although the gap between the incipient bands and the Fermi level is much larger than the SC gap. Therefore in scanning tunneling microscopy experiments, the IGBS induced by a single nonmagnetic impurity are not the definitive evidence for the sign-changing order parameter on the Fermi surfaces. Our findings have special implications for the experimental determination of the pairing symmetry in the FeSe-based superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LiFe1-xCoxAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| FeTe0.6Se0.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
In-gap bound states induced by a single nonmagnetic impurity in sign-preserving s-wave superconductors with incipient bands
similarity 0.95Yi Gao et al. · 2017 · arXiv:1712.05216
Source status unknown — claims are unverified
Cooper pairing in the insulating valence band in iron-based superconductors
similarity 0.95Lun-Hui Hu et al.
Source status unknown — claims are unverified
Spin Gap and Resonance at the Nesting Wave Vector in Superconducting FeSe0.4Te0.6
similarity 0.94Yiming Qiu et al.
Source status unknown — claims are unverified
Temperature dependence of the resonance and low-energy spin excitations in superconducting FeTe0.6Se0.4
similarity 0.94Leland W. Harriger et al.
Source status unknown — claims are unverified
Effect of nonmagnetic impurities on s± superconductivity in the presence of incipient bands
similarity 0.94X. Chen et al.
Source status unknown — claims are unverified
Impurity states and cooperative magnetic order in Fe-based superconductors
similarity 0.93Maria N. Gastiasoro et al.
Source status unknown — claims are unverified