Quantized charge transport in chiral Majorana edge modes

Abstract

Majorana fermions can be realized as quasiparticles in topological superconductors, with potential applications in topological quantum computing. Recently, lattices of magnetic adatoms deposited on the surface of s-wave superconductors - Shiba lattices - have been proposed as a new platform for topological superconductivity. These systems possess the great advantage that they are accessible via scanning-probe techniques, and thus enable the local manipulation and detection of Majorana modes. Realizing quantum bits on this basis will rely on the creation of nanoscopic Shiba lattices, so-called Shiba islands. Here, we demonstrate that the topological Majorana edge modes of such islands display universal electronic and transport properties. Most remarkably, these Majorana modes possess a quantized charge conductance that is proportional to the topological Chern number, C, and carry a supercurrent whose chirality reflects the sign of C. These results establish nanoscopic Shiba islands as promising components in future topology-based devices.

arXiv comment5+10 pages, 4+8 figures

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Cited by in corpus (32)

• Topological superconductivity in a van der Waals heterostructure
• Single magnetic adsorbates on s-wave superconductors
• Signature of Dispersing 1D Majorana Channels in an Iron-based Superconductor
• Atomic-Scale Interface Engineering of Majorana Edge Modes in a 2D Magnet-Superconductor Hybrid System
• Amorphous topological superconductivity in a Shiba glass
• Topological Superconductivity in Skyrmion Lattices
• Electronic and Magnetic Characterization of Epitaxial VSe${}_2$ Monolayers on Superconducting NbSe${}_2$
• A Two-Dimensional Metal-Organic Framework on Superconducting NbSe${}_2$
• Topological superconductivity induced by a triple-Q magnetic structure
• Dimensional Tuning of Majorana Fermions and the Real Space Counting of the Chern Number
• High-Temperature Majorana Fermions in Magnet-Superconductor Hybrid Systems
• Quantum Engineering of Majorana Fermions
• How to measure the Majorana polarization of a topological planar Josephson junction
• Emergent vortex Majorana zero mode in iron-based superconductors
• Volkov-Pankratov states in topological superconductors
• Origin of Topological Surface Superconductivity in FeSe${}_{0.45}$Te${}_{0.55}$
• Probing chiral edge states in topological superconductors through spin-polarized local density of state measurements
• Supercurrent as a Probe for Topological Superconductivity in Magnetic Adatom Chains
• Stability of Disordered Topological Superconducting Phases in Magnet--Superconductor Hybrid Systems
• Delocalisation of Majorana quasiparticles in plaquette--nanowire hybrid system
• Shot-noise and differential conductance as signatures of putative topological superconductivity in FeSe${}_{0.45}$Te${}_{0.55}$
• Increased localization of Majorana modes in antiferromagnetic chains on superconductors
• Competing topological superconducting phases in FeSe${}_{0.45}$Te${}_{0.55}$
• Emergence of Exotic Spin Texture in Supramolecular Metal Complexes on a 2D Superconductor
• Gate-tunable topological superconductivity in a supramolecular electron spin lattice
• Investigation of the Yu-Shiba-Rusinov states of a multi-impurity Kondo system
• Spin Signature of Majorana Fermions in Topological Nodal-Point Superconductors
• Josephson junction arrays as a platform for topological phases of matter
• Bound states induced by the ferromagnetic dimer in a triangular lattice
• Identification of the Majorana edge modes in tight-binding systems based on the Krylov method
• Chiral Majorana Fermions in two dimensional square lattice antiferromagnet with proximity-induced superconductivity
• Signatures of topological phase transitions in the s-wave superconductor at finite temperature