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.

arXiv comment10 pages, 7 figures, supplementary materials included

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• Scalable Majorana vortex modes in iron-based superconductors
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• Intrinsic Time-reversal-invariant Topological Superconductivity in Thin Films of Iron-based Superconductors
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• Competing Vortex Topologies in Iron-based Superconductors
• Tunable vortex Majorana modes controlled by strain in homogeneous LiFeAs
• Bulk Fermi surface of the layered superconductor TaSe3 with three-dimensional strong topological insulator state
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• Emergent vortex Majorana zero mode in iron-based superconductors
• Boundary Topological 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
• Protocol for reading out Majorana vortex qubit and testing non-Abelian statistics
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• Zero-Energy Modes on Superconducting Bismuth Islands Deposited on Fe(Te,Se)
• Phase shift and magnetic anisotropy induced field splitting of impurity states in (Li1-xFex)OHFeSe superconductor
• A disorder-sensitive emergent vortex phase identified in high-Tc superconductor (Li,Fe)OHFeSe
• Majorana corner modes and flat-band Majorana edge modes in superconductor/topological-insulator/superconductor junctions
• 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
• Deterministic topological quantum gates for Majorana qubits without ancillary modes
• Phase diagrams of superconducting topological surface states
• Dissipationless topological quantum computation for Majorana objects in sparse-dense mixed encoding process
• Chiral Majorana Edge Modes and Vortex Majorana Zero Modes in Superconducting Antiferromagnetic Topological Insulator
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• Nontrivial topological states in BaSn5 superconductor probed by de Haas-van Alphen quantum oscillations
• Detecting and Distinguishing Majorana Zero Modes with the Scanning Tunneling Microscope
• Extracting intrinsic superconducting properties in intercalated layered superconductors using an extended 2D Tinkham model
• Excess photon-assisted noise of Majorana and Andreev bound states
• Electronic and Superconducting Properties of Some FeSe-based Single Crystals and Films Grown Hydrothermally