Gap-filling states induced by disorder and Zeeman coupling in the nodeless chiral superconducting Bi/Ni bilayer system
Rasoul Ghadimi, Mehdi Kargarian, S. Akbar Jafari
DOI 10.1103/PhysRevB.100.024502 · 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
Motivated by the recently discovered time-reversal symmetry-breaking superconductivity in the epitaxial Bi/Ni bilayer system with transition temperature Tc≈4.2K and the observation of a zero-bias anomaly in a background of gap-filling states in tunneling measurements, we show that gap-filling states can appear in the fully gapped dxy±idx2−y2 superconducting states. We consider a model of helical electron states with d-wave pairing. In particular, we show that both magnetic and nonmagnetic impurities can create states within the superconducting gap. Alternatively, we show that the coupling of the electron spins to the in-plane Zeeman field provided by nickel can also create gap-filling states by producing Bogoliubov Fermi surfaces.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi/Ni Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.2 | Pressure not reported | onset |
Similar papers
Disorder and Zeeman coupling induced gap-filling states in the nodeless chiral superconducting Bi/Ni bilayer system
similarity 0.94Rasoul Ghadimi et al. · 2019 · arXiv:1901.10132
Source status unknown — claims are unverified
Vortex bound states of charge and magnetic fluctuations induced topological superconductors in heterostructures
similarity 0.93Hossein Hosseinabadi & Mehdi Kargarian
Source status unknown — claims are unverified
Magnetic-field-tuned superconductor-to-insulator transitions in amorphous Bi films with nanoscale hexagonal arrays of holes
similarity 0.92M. D. Stewart, Jr. et al.
Source status unknown — claims are unverified
Possible robust insulator-superconductor transition on solid inert gas and other substrates
similarity 0.91K. Das Gupta et al.
Source status unknown — claims are unverified
Superconductivity in a Bi/Ni bilayer
similarity 0.90Sung-Po Chao
Source status unknown — claims are unverified
Fully gapped superconductivity with preserved time-reversal symmetry in NiBi3 single crystals
similarity 0.90T. Shang et al.
Source status unknown — claims are unverified