Endless Dirac nodal lines in kagome-metal Ni3In2S2

Abstract Topological semimetals are a frontier of quantum materials. In multiband electronic systems, topological band crossings can form closed curves, known as nodal lines. the presence spin–orbit coupling and/or symmetry-breaking operations, lines break into Dirac/Weyl nodes and give rise to interesting transport properties, such chiral anomaly giant anomalous Hall effect. Recently, time-reversal induced Weyl fermions observed in kagome-metal Co 3 Sn 2 S , triggering interests nodal-line excitations kagome systems. Here, using first-principles calculations symmetry-based indicator theories, we find six endless along stacking direction layers two rings plane nonmagnetic Ni . The linear dipsersive structure, confirmed by angle-resolved photoemission spectroscopy, induces large magnetoresistance up 2000% at 9 T. Our results establish diverse landscape metals.