Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide FeSe0.45Te0.55
Saheli Sarkar, John Van Dyke, Peter O. Sprau, Freek Massee, Ulrich Welp, Wai-Kwong Kwok, J. C. Seamus Davis, Dirk K. Morr
DOI 10.1103/PhysRevB.96.060504 · 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 demonstrate that the differential conductance, dI/dV, measured via spectroscopic imaging scanning tunneling microscopy in the doped iron chalcogenide FeSe0.45Te0.55, possesses a series of characteristic features that allow one to extract the orbital structure of the superconducting gaps. This yields nearly isotropic superconducting gaps on the two holelike Fermi surfaces, and a strongly anisotropic gap on the electronlike Fermi surface. Moreover, we show that the pinning of nematic fluctuations by defects can give rise to a dumbbell-like spatial structure of the induced impurity bound states, and explains the related C2 symmetry in the Fourier transformed differential conductance.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| FeSe0.45Te0.55 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| FeSe0.42Te0.58 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| FeSe0.4Te0.6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Fe1.03Te0.7Se0.3 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 |
| FeTe0.55Se0.45 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Correlations among STM observables in disordered unconventional superconductors
similarity 0.96Miguel Antonio Sulangi et al.
Source status unknown — claims are unverified
Dopant clustering, electronic inhomogeneity, and vortex pinning in iron-based superconductors
similarity 0.96Can-Li Song et al.
Source status unknown — claims are unverified
Higher-Order Topology and Nodal Topological Superconductivity in Fe(Se,Te) Heterostructures
similarity 0.96Rui-Xing Zhang et al.
Source status unknown — claims are unverified
Coexistence of orbital degeneracy lifting and superconductivity in iron-based superconductors
similarity 0.96H. Miao et al.
Source status unknown — claims are unverified
Signatures of nodeless multiband superconductivity and particle-hole crossover in the vortex cores of FeTe0.55Se0.45
similarity 0.95Christophe Berthod
Source status unknown — claims are unverified
Three-dimensional superconducting gap in FeSe from angle-resolved photoemission spectroscopy
similarity 0.95Y. S. Kushnirenko et al.
Source status unknown — claims are unverified