Overview

• Nature Communications published on August 14 presents direct experimental proof that flat electronic bands in the chromium-based kagome metal CsCr3Sb5 actively influence its properties
• Researchers synthesized unusually large, high-purity CsCr3Sb5 crystals via a refined method and employed angle-resolved photoemission spectroscopy and resonant inelastic X-ray scattering to map electronic and magnetic excitations
• Custom strong-correlation lattice modeling reproduced the observed features and validated long-standing theoretical predictions of active flat-band behavior
• Authors assert the findings establish a pathway for engineering exotic superconductivity and other quantum phases through chemical and structural control of kagome lattice geometry
• The study was supported by the U.S. Department of Energy, National Science Foundation, Air Force Office of Scientific Research and key philanthropic foundations, signaling broad institutional investment in quantum materials research