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The kagome lattice, consisting of interconnected triangles and hexagonsuniquely, is an excellent model system for study frustrated magnetism,electronic correlation and topological electronic structure. After an intensiveinvestigation on frustrated magnetism in insulating magnetic kagome lattices,the interplay between charge and spin degrees of freedom via spin-orbitalcoupling in metallic systems (kagome metals) has become an attractive topicrecently. Here, we study centrosymmetric YMn6Sn6 with Mn kagome lattice. Wediscover that it exhibits giant topological Hall effect near room temperature,ascribed to the field-induced non-collinear spin texture, possibly a skyrmionlattice (SkL) state. Combined with the large intrinsic anomalous Hall effect,YMn6Sn6 shows a synergic effect of real- and momentum-space Berry phase onphysical properties. Since the features of tunable magnetic interaction andflexible structure in this large homologous series, it provides a novelplatform for understanding the influence of electronic correlations ontopological quantum states in both real and momentum spaces.

Near-room-temperature giant topological Hall effect in antiferromagnetic kagome metal YMn6Sn6