Quantized conductance of Majorana zero mode in the vortex of the topological superconductor (Li0.84Fe0.16)OHFeSe

Abstract

The Majorana zero mode (MZM), which manifests as an exotic neutral excitation in superconductors, is the building block of topological quantum computing. It has recently been found in the vortices of several iron-based superconductors as a zero-bias conductance peak (ZBCP) in tunneling spectroscopy. In particular, a clean and robust MZM has been observed in the cores of free vortices in (Li0.84Fe0.16)OHFeSe. Here using scanning tunneling spectroscopy (STS), we demonstrate that Majorana-induced resonant Andreev reflection occurs between the STM tip and this zero-bias bound state, and consequently, the conductance at zero bias is quantized as 2e2/h. Our results present a hallmark signature of the MZM in the vortex of an intrinsic topological superconductor, together with its intriguing behavior.

10 pages, 7 figures, supplementary materials included

References in corpus (6)

• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Non-Abelian quantum order in spin-orbit-coupled semiconductors: The search for topological Majorana particles in solid state systems
• Electron temperature and tunnel coupling dependence of zero-bias and almost-zero-bias conductance peaks in Majorana nanowires

Cited by in corpus (40)

• Exotic Superconducting States in FeSe-based Materials
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Probing topological quantum matter with scanning tunnelling microscopy
• Charge-Density-Wave-Induced Peak-Dip-Hump Structure and the Multiband Superconductivity in a Kagome Superconductor CsV${}_3$Sb${}_5$
• Hunting for Majoranas
• Tunable vortex Majorana zero modes in LiFeAs superconductor
• Intrinsic Time-reversal-invariant Topological Superconductivity in Thin Films of Iron-based Superconductors
• Vortex-line topology in iron-based superconductors with and without second-order topology
• Competing Vortex Topologies in Iron-based Superconductors
• Correlation-corrected band topology and topological surface states in iron-based superconductors
• Tunable vortex Majorana modes controlled by strain in homogeneous LiFeAs
• Boundary Topological Superconductors
• Emergent vortex Majorana zero mode in iron-based superconductors
• Canted Antiferromagnetism in the Quasi-1D Iron Chalcogenide BaFe${}_2$Se${}_4$
• Experimental review on Majorana zero-modes in hybrid nanowires
• Raman Study of Cooper Pairing Instabilities in (Li${}_{1-x}$Fe${}_x$)OHFeSe
• Quasi two-dimensional nature of high-Tc superconductivity in iron-based (Li,Fe)OHFeSe
• Revealing the Microscopic Mechanism of Elementary Vortex Pinning in Superconductors
• Differential current noise as an identifier of Andreev bound states that induce nearly quantized conductance plateaus
• Observation of robust zero-energy state and enhanced superconducting gap in a tri-layer heterostructure of MnTe/Bi2Te3/Fe(Te, Se)
• Non-Hermiticity stabilized Majorana zero modes in semiconductor-superconductor nanowires
• Braiding Majorana Zero Mode in An Electrically Controllable Way
• Phase shift and magnetic anisotropy induced field splitting of impurity states in (Li1-xFex)OHFeSe superconductor
• Majorana corner modes and flat-band Majorana edge modes in superconductor/topological-insulator/superconductor junctions
• A disorder-sensitive emergent vortex phase identified in high-Tc superconductor (Li,Fe)OHFeSe
• Observation of Yu-Shiba-Rusinov-like states at the edge of CrBr3/NbSe2 heterostructure
• Chiral topological superconducting state with Chern number $\mathcal{C}=-2$ in Pb${}_3$Bi/Ge(111)
• Controllable Majorana vortex states in iron-based superconducting nanowires
• Three-dimensional time reversal invariant topological superconductivity in doped chiral topological semimetals
• Theoretical proposal to obtain strong Majorana evidence from scanning tunneling spectroscopy of a vortex with a dissipative environment
• Dissipationless topological quantum computation for Majorana objects in sparse-dense mixed encoding process
• Phase diagrams of superconducting topological surface states
• Chiral Majorana Edge Modes and Vortex Majorana Zero Modes in Superconducting Antiferromagnetic Topological Insulator
• Deterministic topological quantum gates for Majorana qubits without ancillary modes
• A hierarchy in Majorana non-abelian tests and hidden variable models
• Nontrivial topological states in BaSn5 superconductor probed by de Haas-van Alphen quantum oscillations
• Electronic and Superconducting Properties of Some FeSe-based Single Crystals and Films Grown Hydrothermally
• Detecting and Distinguishing Majorana Zero Modes with the Scanning Tunneling Microscope
• Excess photon-assisted noise of Majorana and Andreev bound states
• Extracting intrinsic superconducting properties in intercalated layered superconductors using an extended 2D Tinkham model