摘要：SummaryThe non-symmorphic crystal symmetry protection in the layered topological semimetal Nb3SiTe6can generate exotic band crossings. Herein, high-quality Nb3SiTe6single crystal was synthesized via chemical vapor transport. The lattice structure of Nb3SiTe6was characterized by scanning transmission electron microscopy, X-ray diffraction, core-level photoemission, and Raman spectroscopies. Angle-resolved photoemission spectroscopy was used to reveal its topological properties by presenting band structures along different high-symmetry directions. Our data show that nontrivial band features coexist in Nb3SiTe6, including an hourglass-type dispersion formed by two bands along the S-R high-symmetry line, two node lines along the S-X path and the S-R-U path, respectively. These results provide a context for the understanding and exploration of the exotic topological properties of Nb3SiTe6.Graphical abstractDisplay OmittedHighlights•The hourglass-type dispersion is clearly visible from the results of the experiment•Two bulk nodal-lines were found along the S-X and S-R-U high-symmetric directions•The flat band shows the material hosts a quasi-one-dimensional characteristicApplied sciences; Materials science; Nanomaterials
