Quasiparticle interference on Dirac nodal line semimetal ZrSiSe surface*

The discovery of Dirac and Weyl semimetals opens a new era of research on topological non-trivial materials. In contrast to zero-dimensional nodal point inside theses material’s bulk band structure, the bands crossing forms novel line shaped nodes in the so-called nodal line semimetal. ZrSiX (X= S, Se, Te) was predicted and comfirmed by ARPES experiments as a Dirac nodal line material. In this talk, we will present the first quasiparticle interference experimental and theoretical results on ZrSiSe (001) surfaces by meaning of low temperature scanning tunneling microscopy and first principle simulation. The topological properties revealed by the data will also be discussed.