Broken symmetry of in-gap quasiparticle excitations in superconducting FeSe(001) with high defect density
Jonathan Baptista, Sergio Vlaic, Pierre Toulemonde, Sandra Karlsson, Pierre Strobel, Dimitri Roditchev, Stéphane Pons
DOI 10.1103/PhysRevB.98.220502 · Physical Review B
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Abstract
FeSe(001) with a high defect density was studied in the superconductiong phase by means of scanning tunneling spectroscopy at low temperature. Quasiparticle excitations surrounding structural defects are found inside the superconducting gap. This spectral intensity is used for revealing additional scattering channels for the quasiparticle excitations. The related wave vectors are located around the M points of the Brillouin zone and follow C2 symmetry. We attribute the symmetry and the observed lack of dispersion of the scattering channels to the interaction of Bogoliubov quasiparticles with nematic order.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | onset |
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