Among all Fe-based superconductors, FeSe has the simplest composition and crystal
structure, with only the most basic structural unit, the FeSe layer. Due to the ease of …

The neutron spin resonance is generally regarded as a key to understanding the
magnetically mediated Cooper pairing in unconventional superconductors. Here, we report …

Effects of bond randomness and site dilution are systematically investigated for the Kitaev
model describing a quantum spin liquid with fractional excitations of itinerant Majorana …

We report the observation of discrete bound states with the energy levels deviating from the
widely believed ratio of 1∶ 3∶ 5 in the vortices of an iron-based superconductor KCa 2 Fe …

We use ultrafast optical spectroscopy to study the nonequilibrium quasiparticle relaxation
dynamics of the iron-based superconductor KCa2Fe4As4F2 with T c= 33.5 K. Our results …

The 12442 compounds are a recently discovered family of iron-based superconductors, that
share several features with the cuprates due to their strongly anisotropic structure, but are so …

We perform a scanning tunneling microscopy/spectroscopy study on the layered iron-based
superconductor KCa 2 Fe 4 As 4 F 2 with a critical temperature of about 33.5 K. Two types of …

Superconductivity in V-based kagome metals has recently raised great interest as they
exhibit the competing ground states associated with the flat bands and topological electronic …

The recently discovered 12442-type iron-based superconductors (IBSs), ACa 2 Fe 4 As 4 F
2 (A= K, Rb, Cs), are intrinsically self-hole doped stoichiometric compounds that exhibit …

Low-temperature specific heat (SH) is measured for the 12442-type KCa 2 Fe 4 As 4 F 2
single crystal under different magnetic fields. A clear SH jump with the height of Δ C/T| _ T_c …