Surface floating 2D bands in layered nonsymmorphic semimetals: ZrSiS and related compounds

Abstract

In this work, we present a model of the surface states of nonsymmorphic semimetals. These are derived from surface mass terms that lift the high degeneracy imposed in the band structure by the nonsymmorphic bulk symmetries. Reflecting the reduced symmetry at the surface, the bulk bands are strongly modified. This leads to the creation of two-dimensional floating bands, which are distinct from Shockley states, quantum well states or topologically protected surface states. We focus on the layered semimetal ZrSiS to clarify the origin of its surface states. We demonstrate an excellent agreement between DFT calculations and ARPES measurements and present an effective four-band model in which similar surface bands appear. Finally, we emphasize the role of the surface chemical potential by comparing the surface density of states in samples with and without potassium coating. Our findings can be extended to related compounds and generalized to other crystals with nonsymmorphic symmetries.

8 pages, 5 figures

References in corpus (7)

• Classification of topological insulators and superconductors in three spatial dimensions
• Classification of reflection symmetry protected topological semimetals and nodal superconductors
• Unexpected Dirac-Node Arc in the Topological Line-Node Semimetal HfSiS
• Dirac Line-nodes and Effect of Spin-orbit Coupling in Non-symmorphic Critical Semimetal MSiS (M=Hf, Zr)
• Non-symmorphic band degeneracy at the Fermi level in ZrSiTe
• Two-dimensional Spin-Orbit Dirac Point in Monolayer HfGeTe
• Helical Majorana surface states of strongly disordered topological superconductors with time-reversal symmetry

Cited by in corpus (24)

• Temperature-Induced Lifshitz Transition and Possible Excitonic Instability in ZrSiSe
• Emergence of Fermi arcs and novel magnetic splitting in an antiferromagnet
• Chemical pressure effect on the optical conductivity of the nodal-line semimetals ZrSi$Y$ ($Y$=S, Se, Te) and ZrGe$Y$ ($Y$=S, Te)
• Semi-Dirac Fermions in a Topological Metal
• Evidence of topological nodal lines and surface states in the centrosymmetric superconductor SnTaS2
• Evidence for bulk nodal loops and universality of Dirac-node arc surface states in ZrGeXc (Xc = S, Se, Te)
• Evolution of Electronic and Magnetic Properties in Topological Semimetal SmSbxTe2-x
• Magneto-optical probe of the fully gapped Dirac band in ZrSiS
• Origin of the butterfly magnetoresistance in ZrSiS
• Symmetry-selective quasiparticle scattering and electric field tunability of the ZrSiS surface electronic structure
• Signature of an Ultrafast Photo-Induced Lifshitz Transition in the Nodal-Line Semimetal ZrSiTe
• Floating Edge Bands in the Bernevig-Hughes-Zhang model with Altermagnetism
• Quasiparticle interference observation of the topologically non-trivial drumhead surface state in ZrSiTe
• Electron-phonon Coupling and Kohn Anomaly due to the Floating 2D Electronic Bands on the Surface of ZrSiS
• Quasiparticle interference in altermagnets
• Kerr effect in tilted nodal loop semimetals
• Collective excitations and screening in two-dimensional tilted nodal-line semimetals
• Electronic Structure of a Nodal Line Semimetal Candidate TbSbTe
• Evolution of Magnetoresistance in the magnetic topological semimetals NdSbxTe2-x
• Valley polarization of Landau levels driven by residual strain in the ZrSiS surface band
• Broken Screw Rotational Symmetry in the Near-Surface Electronic Structure of $AB$-Stacked Crystals
• Robust quantized thermal conductance of Majorana floating edge bands in d-wave superconductors
• Three-nodal surface phonons in solid-state materials: Theory and material realization
• Crystal Growth and anisotropic magneto-transport properties of semimetallic LaNiSb3