Spectroscopic evidence for the realization of a genuine topological nodal-line semimetal in LaSbTe

Numerous nodal-line semimetal candidates have been predicted and experimentally examined. To realize a genuine semimetal, the Dirac nodes must be robust against spin-orbit coupling lie close to Fermi level so as allow for manifestation of novel properties. By performing band structure calculations angle-resolved photoemission measurements, direct evidence is provided here realization in LaSbTe. This finding creates new opportunity exploring phenomena topological materials.