Observation of topological electronic structure in quasi-1D superconductor TaSe3

Abstract

Topological superconductors (TSCs), with the capability to host Majorana bound states that can lead to non-Abelian statistics and application in quantum computation, have been one of the most intensively studied topics in condensed matter physics recently. Up to date, only a few compounds have been proposed as candidates of intrinsic TSCs, such as doped topological insulator CuxBi2Se3 and iron-based superconductor FeTe0.55Se0.45. Here, by carrying out synchrotron and laser based angle-resolved photoemission spectroscopy (ARPES), we systematically investigated the electronic structure of a quasi-1D superconductor TaSe3, and identified the nontrivial topological surface states. In addition, our scanning tunneling microscopy (STM) study revealed a clean cleaved surface with a persistent superconducting gap, proving it suitable for further investigation of potential Majorana modes. These results prove TaSe3 as a stoichiometric TSC candidate that is stable and exfoliable, therefore a great platform for the study of rich novel phenomena and application potentials.

arXiv commentto appear in Matter

References in corpus (43)

• Topological insulators and superconductors
• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Maximally localized Wannier functions: Theory and applications
• Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
• A generic new platform for topological quantum computation using semiconductor heterostructures
• Search for Majorana fermions in superconductors
• Topological superconductors: a review
• Majorana Zero Modes and Topological Quantum Computation
• Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator
• Realizing Majorana zero modes in superconductor-semiconductor heterostructures
• Odd-Parity Topological Superconductors: Theory and Application to Cu${}_x$Bi${}_2$Se${}_3$
• Majorana fermions in chains of magnetic atoms on a superconductor
• Evidence for Majorana bound state in an iron-based superconductor
• Observation of topological superconductivity on the surface of an iron-based superconductor
• Topological Superconductivity in CuxBi2Se3
• Majorana mode in vortex core of Bi2Te3/NbSe2 topological insulator-superconductor heterostructure
• The Coexistence of Superconductivity and Topological Order in the Bi2Se3 Thin Films
• Quantized Majorana conductance
• Chiral Majorana edge state in a quantum anomalous Hall insulator-superconductor structure
• Majorana fermions emerging from magnetic nanoparticles on a superconductor without spin-orbit coupling
• A precise method for visualizing dispersive features in image plots
• Majorana Fermions in Proximity-coupled Topological Insulator Nanowires
• Multiple topological states in iron-based superconductors
• Nearly quantized conductance plateau of vortex zero mode in an iron-based superconductor
• Robust and clean Majorana zero mode in the vortex core of high-temperature superconductor (Li0.84Fe0.16)OHFeSe
• Local Measurements of the Superconducting Pairing Symmetry in CuxBi2Se3
• Superconducting Topological Surface States in Non-centrosymmetric Bulk Superconductor PbTaSe2
• Coexistence of Intrinsic Superconductivity and Topological Insulator State in Monoclinic Phase WS2
• Symmetry-Protected Majorana Fermions in Topological Crystalline Superconductors: Theory and Application to Sr2RuO4
• Experimental Observation of Topological Superconductivity and Majorana Zero Modes on beta-Bi2Pd Thin Films
• Enhanced superconductivity accompanying a Lifshitz transition in electron-doped FeSe monolayer
• Low-Frequency Electronic Noise in Exfoliated Quasi-1D TaSe3 van Der Waals Nanowires
• Low Resistivity and High Breakdown Current Density of 10-nm Diameter van der Waals TaSe3 Nanowires by Chemical Vapor Deposition
• Observation of Half-Quantum Flux in Unconventional Superconductor $\beta$-Bi${}_2$Pd
• Topological phases in the TaSe3 compound
• Evidence for nematic superconductivity of topological surface states in PbTaSe2
• Observation of charge density wave transition in TaSe3 mesowires
• Bulk Fermi surface of the layered superconductor TaSe3 with three-dimensional strong topological insulator state
• Experimental evidence of anomalously large superconducting gap on topological surface state of $\beta$-$\mathbf{B}{\mathbf{i}}_2\mathbf{Pd}$ film
• Large Magnetoresistance in Topological Insulator Candidate TaSe3
• Strain control of the competition between metallic and semiconducting states in single-layers of TaSe${}_3$

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• Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3
• Correlation-corrected band topology and topological surface states in iron-based superconductors
• Topology hierarchy of transition metal dichalcogenides built from quantum spin Hall layers
• Observation of the topological Dirac fermions and surface states in superconducting BaSn3
• Topological superconductor candidates PdBi${}_2$Te${}_4$ and PdBi${}_2$Te${}_5$ from a generic ab initio strategy
• Observation of spin-polarized surface states in a nodal line semimetal SnTaS${}_2$
• Photoemission Spectroscopic Evidence of Multiple Dirac Cones in Superconducting BaSn${}_3$
• Nontrivial topological states in BaSn5 superconductor probed by de Haas-van Alphen quantum oscillations