Experimental Observation of Topological Superconductivity and Majorana Zero Modes on beta-Bi2Pd Thin Films

Abstract

Using a cryogenic scanning tunneling microscopy, we report the observation of topologically nontrivial superconductivity on a single material of β-Bi2Pd films grown by molecular beam epitaxy. The superconducting gap associated with spinless odd-parity pairing opens on the surface and appears much larger than the bulk one due to the Dirac-fermion enhanced parity mixing of surface pair potential. Majorana zero modes (MZMs), supported by such superconducting states, are identified at magnetic vortices. The superconductivity and MZMs exhibit resistance to nonmagnetic defects, characteristic of time-reversal-invariant topological superconductors. Our results demonstrate a simple platform to generate, manipulate and braid MZMs for quantum computation.

arXiv comment9 pages, 8 figures

References in corpus (34)

• Topological Insulators
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Unpaired Majorana fermions in quantum wires
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Helical liquids and Majorana bound states in quantum wires
• Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
• A generic new platform for topological quantum computation using semiconductor heterostructures
• Exponential Protection of Zero Modes in Majorana Islands
• Colloquium: Majorana Fermions in nuclear, particle and solid-state physics
• Odd-Parity Topological Superconductors: Theory and Application to Cu${}_x$Bi${}_2$Se${}_3$
• Superconductor-Nanowire Devices from Tunneling to the Multichannel Regime: Zero-Bias Oscillations and Magnetoconductance Crossover
• Topological Superconductivity and Superfluidity
• Topological Superconductivity in CuxBi2Se3
• Observation of Majorana fermions with spin selective Andreev reflection in the vortex of topological superconductor
• Majorana mode in vortex core of Bi2Te3/NbSe2 topological insulator-superconductor heterostructure
• Zero-bias peaks in spin-orbit coupled superconducting wires with and without Majorana end-states
• Majorana fermions emerging from magnetic nanoparticles on a superconductor without spin-orbit coupling
• Superconductivity with topological surface state in SrxBi2Se3
• Local Measurements of the Superconducting Pairing Symmetry in CuxBi2Se3
• Fermi Level Tuning of Epitaxial Sb2Te3 Thin Films on Graphene by Regulating Intrinsic Defects and Substrate Transfer Doping
• Superconducting Topological Surface States in Non-centrosymmetric Bulk Superconductor PbTaSe2
• Topological insulator Bi2Se3 thin films grown on double-layer graphene by molecular beam epitaxy
• Topologically protected surface states in a centrosymmetric superconductor beta-PdBi2
• Unusual nature of fully-gapped superconductivity in In-doped SnTe
• Surface spectral function in the superconducting state of a topological insulator
• Tip induced unconventional superconductivity on Weyl semimetal TaAs
• Superconducting proximity effect in three-dimensional topological insulators in the presence of a magnetic field
• Superconductivity at 5.4 K in $\beta$-Bi${}_2$Pd
• How to infer non-Abelian statistics and topological invariants from tunneling conductance properties of realistic Majorana nanowires
• Magnetic field dependence of the density of states in the multiband superconductor $\beta$-Bi${}_2$Pd
• Dirac-Fermion-Induced Parity Mixing in Superconducting Topological Insulators
• Single gap superconductivity in beta-Bi2Pd
• Bound states of a ferromagnetic wire in a superconductor
• Fully gapped superconductivity in the topological superconductor beta-PdBi2

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