Elemental topological Dirac semimetal: α-Sn on InSb(111)

Abstract

Three-dimensional (3D) topological Dirac semimetals (TDSs) are rare but important as a versatile platform for exploring exotic electronic properties and topological phase transitions. A quintessential feature of TDSs is 3D Dirac fermions associated with bulk electronic states near the Fermi level. Using angle-resolved photoemission spectroscopy (ARPES), we have observed such bulk Dirac cones in epitaxially-grown α-Sn films on InSb(111), the first such TDS system realized in an elemental form. First-principles calculations confirm that epitaxial strain is key to the formation of the TDS phase. A phase diagram is established that connects the 3D TDS phase through a singular point of a zero-gap semimetal phase to a topological insulator (TI) phase. The nature of the Dirac cone crosses over from 3D to 2D as the film thickness is reduced.

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Cited by in corpus (34)

• Chemical Principles of Topological Semimetals
• Gapped Electronic Structure of Epitaxial Stanene on InSb(111)
• Engineering topological phases in the Luttinger semimetal $\alpha$-Sn
• Tensile Strained Gray Tin: a New Dirac Semimetal for Observing Negative Magnetoresistance with Shubnikov-de-Haas Oscillation
• Electronic structure of Au-Sn compounds grown on Au(111)
• Stanene: A Good Platform for Topological Insulator and Topological Superconductor
• ARPES and transport studies of the elemental topological insulator $\alpha$-Sn
• The topological surface state of $\alpha$-Sn on InSb(001) as studied by photoemission
• Carrier and Spin Coherent Dynamics in Strained Germanium-Tin Semiconductor on Silicon
• Dimensional Crossover and Topological Phase Transition in Dirac Semimetal Na3Bi Films
• Electron Transport in Dirac and Weyl Semimetals
• Growth and Magnetotransport in Thin Film α-Sn on CdTe
• Tailoring the topological surface state in ultrathin $\alpha$-Sn (111) films
• Thermal Stability Enhancement in Epitaxial α-Sn Films by Strain Engineering
• Structural and electronic properties of the pure and stable elemental 3D topological Dirac semimetal $\alpha$-Sn
• Type-II Superconductivity below 4K in Sn0.4Sb0.6
• Spin-orbit torques and magnetotransport properties of $\alpha$-Sn and $\beta$-Sn heterostructures
• Robust and Pristine Top ological Dirac Semimetal Phase in Pressured Two-Dimensional Black Phosphorous
• Realization of Practical Eightfold Fermions and Fourfold van Hove Singularity in TaCo${}_2$Te${}_2$
• Topological Superconducting Vortex From Trivial Electronic Bands
• High-pressure lithium as an elemental topological semimetal
• First Principles Assessment of CdTe as a Tunnel Barrier at the $\alpha$-Sn/InSb Interface
• Filling-enforced Dirac loops and their evolutions under various perturbations
• Two-dimensional Dirac semiconductor and its material realization
• 3D Topological Semimetal Phases of Strained $\alpha$-Sn on Insulating Substrate
• Growth of bilayer stanene on a magnetic topological insulator aided by a buffer layer
• Crystal-symmetry-protected gapless vortex-line phases in superconducting Dirac semimetals
• Non-orthogonal Spin-Momentum Locking
• Topological transitions of spin-excitations in insulating chiral antiferromagnets
• Synchrotron x-ray diffraction studies of the $\alpha \rightleftharpoons \beta$ structural phase transition in Sn and Sn-Cu
• Absence of backscattering in Fermi-arc-mediated conductivity of topological Dirac semimetal Cd${}_3$As${}_2$
• Large Magneto-Electric Resistance in the Topological Dirac Semimetal alpha Sn
• Predication of topological states in the allotropes of group-IV elements
• Singular flat bands in three dimensions: Landau level spreading, quantum geometry, and Weyl reconstruction