上海科技大学知识管理系统

Interactions among various electronic states such as charge density wave (CDW), magnetism, and superconductivity are of high significance in strongly -correlated systems. While significant progress has been made in understanding the relationship between CDW and superconductivity, the interplay between CDW and magnetic order remains largely elusive. Kagome lattices, which intertwine nontrivial topology, charge order, and magnetism, offer an ideal platform for such studies. The kagome magnet FeGe, hosting the unique coupling between CDW and magnetism, has recently garnered considerable attention in that respect. Here we reveal the significant role of the orbital coupling effect during the CDW phase transition, highlighting the orbital origin of the magnetic moment enhancement in FeGe. Our X-ray absorption experiments and first -principles calculations illuminate the temperature -dependent behavior of Fe3d—Ge4p 3d —Ge 4p orbital hybridization and corroborate its pivotal impact on the magnetic properties of FeGe. These findings introduce an orbital dimension to the correlation between charge and magnetic degrees -of -freedom, advancing our understanding of the intriguing quantum phases resulting from this interplay.