Emergence of topological bands on the surface of ZrSnTe crystal

Abstract

By using angle-resolved photoemission spectroscopy combined with first-principles calculations, we reveal that the topmost unit cell of ZrSnTe crystal hosts two-dimensional (2D) electronic bands of topological insulator (TI) state, though such a TI state is defined with a curved Fermi level instead of a global band gap. Furthermore, we find that by modifying the dangling bonds on the surface through hydrogenation, this 2D band structure can be manipulated so that the expected global energy gap is most likely to be realized. This facilitates the practical applications of 2D TI in heterostructural devices and those with surface decoration and coverage. Since ZrSnTe belongs to a large family of compounds having the similar crystal and band structures, our findings shed light on identifying more 2D TI candidates and superconductor-TI heterojunctions supporting topological superconductors.

arXiv comment5 pages, 4 figures

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• Tunability of the topological nodal-line semimetal phase in ZrSiX-type materials
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• Magnetotransport properties and evidence of topological insulating state in LaSbTe
• Quantum oscillation studies of topological semimetal candidate ZrGeM (M=S, Se, Te)
• Evidence of topological insulator state in the semimetal LaBi
• Experimental Observation of Dirac Nodal Links in Centrosymmetric Semimetal TiB${}_2$
• Surface floating 2D bands in layered nonsymmorphic semimetals: ZrSiS and related compounds
• Experimental observation of bulk nodal lines and electronic surface states in ZrB${}_2$
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• Photoemission Spectroscopic Evidence for the Dirac Nodal Line in Monoclinic Semimetal SrAs${}_3$
• Observation of band crossings protected by nonsymmorphic symmetry in the layered ternary telluride Ta3SiTe6
• Magnetic and electronic properties of a topological nodal line semimetal candidate: HoSbTe
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• Evolution of Magnetism in Magnetic Topological Semimetal NdSb${}_x$Te${}_{2-x+\delta }$
• Physical properties of KMgBi single crystals
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• Critical Behaviors of Anderson Transitions in Three Dimensional Orthogonal Classes with Particle-hole Symmetries
• Robust Dirac lines against Ge vacancy and possible spin-orbit Dirac points in nonsymmorphic HfGe0.92Te
• Electronic structure in a rare-earth based nodal-line semimetal candidate PrSbTe
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• Electronic structure and open-orbit Fermi surface topology in isostructural semimetals NbAs${}_2$ and W${}_2$As${}_3$ with extremely large magnetoresistance
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• Revealing a charge-density-wave gap in the predicted weak topological insulator HoSbTe
• Fermiology of a topological line-nodal compound CaSb2 and its implication to superconductivity: angle-resolved photoemission study
• Ultrafast relaxation of acoustic and optical phonons in a topological nodal-line semimetal ZrSiS
• Chalcogen Doping Effect on the Insulator-to-Metal Transition in GdPS
• Magnetoresistance in ZrSi$X$ ($X=$ S, Se, Te) nodal-line semimetals
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