Majorana mode in vortex core of Bi2Te3/NbSe2 topological insulator-superconductor heterostructure

Abstract

Majorana fermions have been intensively studied in recent years for their importance to both fundamental science and potential applications in topological quantum computing1,2. Majorana fermions are predicted to exist in a vortex core of superconducting topological insulators3. However, they are extremely difficult to be distinguished experimentally from other quasiparticle states for the tiny energy difference between Majorana fermions and these states, which is beyond the energy resolution of most available techniques. Here, we overcome the problem by systematically investigating the spatial profile of the Majorana mode and the bound quasiparticle states within a vortex in Bi2Te3/NbSe2. While the zero bias peak in local conductance splits right off the vortex center in conventional superconductors, it splits off at a finite distance ~20nm away from the vortex center in Bi2Te3/NbSe2, primarily due to the Majorana fermion zero mode. While the Majorana mode is destroyed by reducing the distance between vortices, the zero bias peak splits as a conventional superconductor again. This work provides strong evidences of Majorana fermions and also suggests a possible route to manipulating them.

16 pages, 4 figures

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Cited by in corpus (307)

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• Random-matrix theory of Majorana fermions and topological superconductors
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• Robust and clean Majorana zero mode in the vortex core of high-temperature superconductor (Li0.84Fe0.16)OHFeSe
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• s-wave superconductivity in kagome metal CsV${}_3$Sb${}_5$ revealed by ${}^{121/123}$Sb NQR and ${}^{51}$V NMR measurements
• Tunable Majorana corner states in a two-dimensional second-order topological superconductor induced by magnetic fields
• Braiding without Braiding: Teleportation-Based Quantum Information Processing with Majorana Zero Modes
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• Phase Diagram of the Interacting Majorana Chain Model
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• Atomic line defects and zero-energy end states in monolayer Fe(Te,Se) high-temperature superconductors
• Topological Dirac States and Pairing Correlations in the Non-Centrosymmetric Superconductor PbTaSe2
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• Braiding higher-order Majorana corner states through their spin degree of freedom
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• Transport signatures of Majorana bound states in superconducting hybrid structures
• Prediction of superconductivity and topological aspects in single-layer $\beta$-Bi${}_2$Pd
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• Topological insulators in the NaCaBi family with large SOC gaps
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• Experimental evidence of anomalously large superconducting gap on topological surface state of $\beta$-$\mathbf{B}{\mathbf{i}}_2\mathbf{Pd}$ film
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• Evidence of Interfacial Topological Superconductivity on the Topological Semimetal Tungsten Carbide Induced by Metal Deposition
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• Experimental review on Majorana zero-modes in hybrid nanowires
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• Magnetic moiré surface states and flat chern band in topological insulators
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• Vortex Lattice Structure and Topological Superconductivity in the Quantum Hall Regime
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• Optimizing the transport of Majorana zero modes in one-dimensional topological superconductors
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• Manipulating the Majorana Qubit with the Landau-Zener-Stückelberg Interference
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• Magnetic Flux Control of Chiral Majorana Edge Modes in Topological Superconductor
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• Topological Larkin-Ovchinnikov phase and Majorana zero mode chain in bilayer superconducting topological insulator films
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• Signature of topological non-trivial band structure in Ta${}_3$SiTe${}_6$
• Topological superconductivity in Landau levels
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• Topological Phases in Nodeless Tetragonal Superconductors
• Scanning tunneling spectroscopy investigations of superconducting-doped topological insulators: Experimental pitfalls and results
• Bound fermion states in pinned vortices in the surface states of a superconducting topological insulator: The Majorana bound state
• Anomalous Coherence Length of Majorana Zero Modes at Vortices in Superconducting Topological Insulators
• Observation of Persistent Zero Modes and Superconducting Vortex Doublets in UTe${}_2$
• Evidence the ferromagnetic order on CoSb layer of LaCoSb${}_2$
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• Crystal-symmetry-protected gapless vortex-line phases in superconducting Dirac semimetals
• Topology from Triviality
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• Engineering of many-body Majorana states in a topological insulator/s-wave superconductor heterostructure
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• Higher-order topological superconductor phases in a multilayer system
• Microwave Meissner Screening of Proximity coupled Topological Insulator / Superconductor Bilayers
• Electrostatic effects of the MnBi2Te4-superconductor hetero-structures in chiral Majorana search
• Emergence of Surface Superconductivity through Interference in Superconducting-proximity Topological Insulators
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• Detecting competing orders through the edge states in the heterostructures with high-Tc superconductors
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• Combining quantum spin hall effect and superconductivity in few-layer stanene
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• Trivial and Non-trivial Superconductivity in dsDNA
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