Intrinsic electronic structure and nanoscale domains in the kagome superconductor KV3Sb5 probed by space resolved photoemission spectroscopy

We have investigated the intrinsic electronic structure of the KV (Formula presented) (Formula presented) Sb (Formula presented) (Formula presented) kagome superconductor, which exhibits charge-density-wave (CDW) order, by combining scanning photoelectron microscopy and angle-resolved photoemission spectroscopy using a sub-micron beam. Our findings suggest that in the CDW phase of the system at 30 K percolative paths emerge, while at room temperature the system exhibits homogeneity with suppressed CDW correlations. Despite its inhomogeneous nature, the CDW persists even on the Sb-terminated surface, as evidenced by the Dirac-cone gap associated with (Formula presented) (Formula presented) CDW fluctuations. These results suggest that KV (Formula presented) (Formula presented) Sb (Formula presented) (Formula presented) can serve as a model system for exploring emergent quantum phenomena arising from the interplay of topology, strong correlations, and lattice instabilities.