Unconventional superconductivity found in CsV3Sb5-derived kagome materials.

Ultrahigh-resolution and low-temperature angle-resolved photoemission spectroscopy have been used to directly observe a nodeless, nearly isotropic, and orbital-independent superconducting gap in the momentum space of two exemplary CsV3Sb5-derived kagome superconductors. The gap structure is robust to the appearance or absence of charge order in the normal state, providing indispensable information on the electron pairing symmetry of kagome superconductors and advancing our understanding of the superconductivity and intertwined electronic orders in quantum materials.