The recently discovered Fe-pnictide and chalcogenide superconductors display low-
temperature properties suggesting superconducting gap structures which appear to vary …

We report combined experimental and theoretical analysis of superconductivity in CaK (Fe
1− x Ni x) 4 As 4 (CaK1144) for x= 0, 0.017, and 0.034. To obtain the superfluid density ρ …

Majorana zero modes (MZMs) that obey the non-Abelian statistics have been intensively
investigated for potential applications in topological quantum computing. The prevailing …

We study impurity bound states and impurity-induced order in the superconducting state of
LiFeAs within a realistic five-band model based on the band structure and impurity potentials …

The single-impurity problem in iron-pnictide superconductors is investigated by solving the
Bogoliubov–de Gennes (BdG) equation in a microscopic multiorbital model. We construct a …

Using the multiband model we analyze the Ruderman-Kittel-Kasuya-Yosida (RKKY)
interaction between the magnetic impurities in layered ferropnictide superconductors. In the …

We investigate the impact of topology on the existence of impurity subgap states in a time-
reversal-invariant superconductor with an extended s-wave pairing and strong spin-orbit …

We investigate the local density of states in the vicinity of a native dumbbell defect arising
from an Fe vacancy in FeSe single crystals. The tunneling spectra close to the impurity …

In this work, we study the magnetic impurity resonance states in the superconducting phase
of'magic'angle twisted bilayer graphene for different pairing symmetries. Using a two-orbital …

Abstract The indirect Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction in iron pnictide
and chalcogenide metals is calculated for a simplified four-band Fermi surface model. We …