Discovery of high-temperature charge order and time-reversal symmetry-breaking in the kagome superconductor YRu₃Si₂.

ABSTRACT: Identifying high-temperature unconventional charge order and superconductivity in kagome systems is crucial for understanding frustrated, correlated electrons and enabling future quantum technologies. Here, we report that the kagome superconductor YRu₃Si₂ hosts an exceptional interplay of charge order, magnetism, and superconductivity, revealed through a comprehensive suite of muon spin rotation (μSR), magnetotransport, X-ray diffraction, and density functional theory (DFT). We identify a high-temperature charge-ordered state with propagation vector (1/2,0,0) and a record onset temperature of 800 K, unprecedented in kagome systems and quantum materials more broadly. μSR measurements further reveal time-reversal symmetry-breaking below 25 K and field-induced magnetism

SUBMITTER: Kral P 

PROVIDER: S-EPMC12855824 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature