Quasiparticle interference observation of the topologically non-trivial drumhead surface state in ZrSiTe

Abstract

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

7 pages, 3 figures

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Cited by in corpus (6)

• Topological Semimetal driven by Strong Correlations and Crystalline Symmetry
• Dispersive Drumhead States in Nodal-Line Semimetal Junctions
• Delocalization of topological surface states by diagonal disorder in nodal loop semimetals
• Nodal-line semimetals and their variance
• Interfaces of nodal-line semimetals: drum states, transport and refraction
• Disorder-induced instability of a Weyl nodal loop semimetal towards a diffusive topological metal with protected multifractal surface states