Quasiparticle interference observation of the topologically nontrivial drumhead surface state in ZrSiTe

Drumhead surface states that link together loops of nodal lines arise in Dirac nodal-line semimetals as a consequence the topologically non-trivial band crossings. We used low-temperature scanning tunneling microscopy and Fourier-transformed spectroscopy to investigate quasiparticle interference (QPI) properties ZrSiTe. Our results show two scattering signals across drumhead state resolving energy-momentum relationship through occupied unoccupied energy ranges it is predicted span. Observation this contrast previous studies on ZrSiS ZrSiSe, where QPI was dominated by trivial bulk bands states. Furthermore, we observe near $\mathbf{k} \rightarrow -\mathbf{k}$ process $\Gamma$-point, enabled between spin-split material.