Non-Majorana modes in diluted spin chains proximitized to a superconductor
arXiv:2112.05708 · doi:10.1073/pnas.2210589119
Abstract
Spin chains proximitized with superconducting condensates have emerged as one of the most promising platforms for the realization of Majorana modes. Here, we craft diluted spin chains atom-by-atom following seminal theoretical proposal suggesting indirect coupling mechanisms as a viable route to trigger topological superconductivity. Starting from single adatoms hosting deep Shiba states, we use the highly anisotropic Fermi surface of the substrate to create spin chains characterized by different magnetic configurations along distinct crystallographic directions. By scrutinizing a large set of parameters we reveal the ubiquitous emergence of boundary modes. Although mimicking signatures of Majorana modes, the end modes are identified as topologically trivial Shiba states. Our work demonstrates that zero-energy modes in spin chains proximitized to superconductors are not necessarily a link to Majorana modes while simultaneously identifying new experimental platforms, driving mechanisms, and test protocols for the determination of topologically non-trivial superconducting phases.
References in corpus (39)
- 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
- Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
- Helical liquids and Majorana bound states in quantum wires
- New directions in the pursuit of Majorana fermions in solid state systems
- Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
- Search for Majorana fermions in superconductors
- Non-Abelian statistics and topological quantum information processing in 1D wire networks
- Topological superconductors: a review
- Symmetry and Topology in Non-Hermitian Physics
- Majorana fermions in chains of magnetic atoms on a superconductor
- Majorana mode in vortex core of Bi2Te3/NbSe2 topological insulator-superconductor heterostructure
- Topological Superconductivity and Majorana Fermions in RKKY Systems
- Topological superconducting phase in helical Shiba chains
- From Andreev to Majorana bound states in hybrid superconductor-semiconductor nanowires
- Topological superconductivity in a van der Waals heterostructure
- Towards a realistic transport modeling in a superconducting nanowire with Majorana fermions
- End states and subgap structure in proximity-coupled chains of magnetic adatoms
- Probing Atomic Structure and Majorana Wavefunctions in Mono-Atomic Fe-chains on Superconducting Pb-Surface
- Signature of Dispersing 1D Majorana Channels in an Iron-based Superconductor
- Evidence of topological Shiba bands in artificial spin chains on superconductors
- Mapping the orbital structure of impurity bound states in a superconductor
- Controlled length-dependent interaction of Majorana modes in Yu-Shiba-Rusinov chains
- Correlations between Majorana fermions through a superconductor
- Quantum Interference between Impurities: Creating Novel Many-Body States in s-wave Superconductors
- Engineering the spin couplings in atomically crafted spin chains on an elemental superconductor
- The chiral biquadratic pair interaction
- Dimensional crossover in spin-orbit-coupled semiconductor nanowires with induced superconducting pairing
- Quantum spins and hybridization in artificially-constructed chains of magnetic adatoms on a superconductor
- Controlling in-gap end states by linking nonmagnetic atoms and artificially-constructed spin chains on superconductors
- Tuning interactions between spins in a superconductor
- On the preparation and electronic properties of clean superconducting Nb(110) surfaces
- Impurities, Quantum Interference and Quantum Phase Transitions in s-wave superconductors
- Long range and highly tunable interaction between local spins coupled to a superconducting condensate
- Correlating Josephson supercurrents and Shiba states in quantum spins unconventionally coupled to superconductors
- Atomic Manipulation of In-gap States on the -BiPd Superconductor
- Anisotropic vortices on superconducting Nb(110)
- Anomalous excitations of atomically crafted quantum magnets
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- Majorana nanowires for topological quantum computation
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- Testing the topological nature of end states in antiferromagnetic atomic chains on superconductors
- Majorana quasiparticles in atomic spin chains on superconductors
- Josephson effect in a Fibonacci quasicrystal
- Colloquium: Synthetic quantum matter in non-standard geometries
- Topological superconductivity in Fibonacci quasicrystals
- Wave-function engineering on superconducting substrates: Chiral Yu-Shiba-Rusinov molecules
- Tailoring phase transition from topological superconductor to trivial superconductor induced by magnetic textures of a spin-chain on a -wave superconductor
- Systematic study of Mn atoms, artificial dimers and chains on superconducting Ta(110)
- Search for large topological gaps in atomic spin chains on proximitized superconducting heavy metal layers
- Increased localization of Majorana modes in antiferromagnetic chains on superconductors
- Observation of Yu-Shiba-Rusinov-like states at the edge of CrBr3/NbSe2 heterostructure
- Controlling Majorana hybridization in magnetic chain-superconductor systems
- Majorana-magnon interactions in topological Shiba chains
- Gate-tunable topological superconductivity in a supramolecular electron spin lattice
- Predicting topological invariants and unconventional superconducting pairing from density of states and machine learning
- Fractional Spin Quantum Hall Effect in Weakly Coupled Spin Chain Arrays
- Spin-resolved nonlocal transport in proximitized Rashba nanowires
- Effects of electron-electron interactions in the Yu-Shiba-Rusinov lattice model
- Direct signatures of -level hybridization and dimerization in magnetic adatom chains on a superconductor
- Odd-parity ground state in dilute Yu-Shiba-Rusinov dimers and chains