Observation of Gapless Dirac Surface States in ZrGeTe

Abstract

The experimental discovery of the topological Dirac semimetal establishes a platform to search for various exotic quantum phases in real materials. ZrSiS-type materials have recently emerged as topological nodal-line semimetals where gapped Dirac-like surface states are observed. Here, we present a systematic angle-resolved photoemission spectroscopy (ARPES) study of ZrGeTe, a nonsymmorphic symmetry protected Dirac semimetal. We observe two Dirac-like gapless surface states at the same $\bar{X}$ point of the Brillouin zone. Our theoretical analysis and first-principles calculations reveal that these are protected by crystalline symmetry. Hence, ZrGeTe appears as a rare example of a naturally fine tuned system where the interplay between symmorphic and non-symmorphic symmetry leads to rich phenomenology, and thus opens for opportunities to investigate the physics of Dirac semimetallic and topological insulating phases realized in a single material.

20 pages, 7 figures

References in corpus (20)

• Topological Insulators with Inversion Symmetry
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Topological Crystalline Insulators
• Classification of stable three-dimensional Dirac semimetals with nontrivial topology
• Topological Node-Line Semimetal in Three Dimensional Graphene Networks
• Topological nodal-line fermions in ZrSiSe and ZrSiTe
• Observation of Topological Nodal Fermion Semimetal Phase in ZrSiS
• Discovery of Dirac Node Arcs in PtSn4
• A precise method for visualizing dispersive features in image plots
• New classes of topological crystalline insulators with unpinned surface Dirac cones
• 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)
• Z2-topology in nonsymmorphic crystalline insulators: Mobius twist in surface states
• Tunability of the topological nodal-line semimetal phase in ZrSiX-type materials
• Tunable Line Node Semimetals
• Non-symmorphic band degeneracy at the Fermi level in ZrSiTe
• Extremely large and significantly anisotropic magnetoresistance in ZrSiS single crystals
• Quantum oscillation studies of topological semimetal candidate ZrGeM (M=S, Se, Te)
• Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
• Observation of Dirac-Like Semi-Metallic Phase in NdSb

Cited by in corpus (24)

• Topological Semimetals from first-principles
• Chemical Principles of Topological Semimetals
• Topological Semimetals in Square-Net Materials
• Observation of topological nodal-line fermionic phase in GdSbTe
• Tunable large spin Hall and spin Nernst effects in Dirac semimetals ZrXY (X=Si, Ge; Y=S, Se, Te)
• Observation of topological nodal-loop state in RAs3 (R = Ca, Sr)
• Electronic and Magnetic Properties of Topological Semimetal Candidate NdSbTe
• Observation of multiple nodal-lines in SmSbTe
• Magnetic Topological Semimetal Phase with Electronic Correlation Enhancement in SmSbTe
• Evidence for bulk nodal loops and universality of Dirac-node arc surface states in ZrGeXc (Xc = S, Se, Te)
• Observation of gapless nodal-line states in NdSbTe
• Distinct multiple fermionic states in a single topological metal
• Evolution of Electronic and Magnetic Properties in Topological Semimetal SmSbxTe2-x
• Electronic band structure and surface states in Dirac semimetal LaAgSb${}_2$
• Symmetry-selective quasiparticle scattering and electric field tunability of the ZrSiS surface electronic structure
• Electronic structure in a rare-earth based nodal-line semimetal candidate PrSbTe
• Impurity-induced resonant states in topological nodal-line semimetals
• Dirac Nodal Line and Rashba Splitting Surface States in Nonsymmorphic ZrGeTe
• Large Negative Magnetoresistance in off-Stochiometric Topological Material PrSbTe
• Ultrafast relaxation of acoustic and optical phonons in a topological nodal-line semimetal ZrSiS
• Evolution of the Chern Gap in Chern Magnet HoMn${}_6$Sn${}_{6-x}$Ge${}_x$
• Spectroscopic Evidence on Realization of a Genuine Topological Nodal Line Semimetal in LaSbTe
• Chalcogen Doping Effect on the Insulator-to-Metal Transition in GdPS
• Quantum oscillation and unusual protection mechanism of the surface state in nonsymmorphic semimetals