Superconductivity and phonon self-energy effects in Fe1+yTe0.6Se0.4
S.-F. Wu, A. Almoalem, I. Feldman, A. Lee, A. Kanigel, G. Blumberg
DOI 10.1103/PhysRevResearch.2.013373 · Physical Review Research
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 study a Fe1+yTe0.6Se0.4 multiband superconductor with Tc=14K by polarization-resolved Raman spectroscopy. Deep in the superconducting state, we detect pair-breaking excitation at 2Δ=5.6meV in the XY(B2g) scattering geometry, consistent with the fundamental gap energy Δ=3meV revealed by ARPES on the holelike Fermi pocket with dxz/dyz character. We analyze the superconductivity-induced phonon self-energy effects for the B1g(Fe) phonon mode and derive the electron-phonon coupling constant λΓ≈0.026, which is insufficient to explain superconductivity with Tc=14K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Fe1+yTe0.6Se0.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14 | Pressure not reported | unknown |
| FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39 | Pressure not reported | unknown |
| V3Ga Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.2 | Pressure not reported | unknown |
Similar papers
Superconductivity close to magnetic instability in Fe(Se1−xTex)0.82
similarity 0.97M. H. Fang et al.
Source status unknown — claims are unverified
Relationship between superconductivity and nematicity in FeSe1−xTex (x=0−0.5) films studied by complex conductivity measurements
similarity 0.96Hodaka Kurokawa et al.
Source status unknown — claims are unverified
Correlation between superconducting transition temperatures and carrier densities in Te- and S-substituted FeSe thin films
similarity 0.96Fuyuki Nabeshima et al.
Source status unknown — claims are unverified
New Superconducting and Semiconducting Fe-B Compounds Predicted with an Ab Initio Evolutionary Search
similarity 0.96A. N. Kolmogorov et al.
Source status unknown — claims are unverified
Specific heat and gap structure of a nematic superconductor: Application to FeSe
similarity 0.96Kazi Ranjibul Islam et al.
Source status unknown — claims are unverified
Pressure dependence of the electronic structure and spin state in Fe1.01Se superconductors probed by x-ray absorption and x-ray emission spectroscopy
similarity 0.96J. M. Chen et al.
Source status unknown — claims are unverified