Quantum magnetism and topological superconductivity in Yu-Shiba-Rusinov chains
arXiv:2107.00031 · doi:10.1103/PhysRevLett.128.036801
Abstract
Chains of magnetic adatoms on superconductors have been discussed as promising systems for realizing Majorana end states. Here, we show that dilute Yu-Shiba-Rusinov (YSR) chains are also a versatile platform for quantum magnetism and correlated electron dynamics, with widely adjustable spin values and couplings. Focusing on subgap excitations, we derive an extended model for dilute quantum YSR chains and use it to study the phase diagram as well as tunneling spectra. We explore the implications of quantum magnetism for the formation of a topological superconducting phase, contrasting it to existing models assuming classical spin textures.
16 pages including supplementary information; 4 figures
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Cited by in corpus (14)
- Hunting for Majoranas
- Quantum spins and hybridization in artificially-constructed chains of magnetic adatoms on a superconductor
- Long range and highly tunable interaction between local spins coupled to a superconducting condensate
- Quantum Yu-Shiba-Rusinov dimers
- Magnetic impurity in a one-dimensional few-fermion system
- Yu-Shiba-Rusinov bands in a self-assembled kagome lattice of magnetic molecules
- Complex magnetic ground states and topological electronic phases of atomic spin chains on superconductors
- Controlling Majorana hybridization in magnetic chain-superconductor systems
- Magnetic impurities on superconducting Pb surfaces
- Probing Magnetic and Triplet Correlations in Spin-Split Superconductors with Magnetic Impurities
- Effects of electron-electron interactions in the Yu-Shiba-Rusinov lattice model
- Magnetic flux induced topological superconductivity in magnetic atomic rings
- Odd-parity ground state in dilute Yu-Shiba-Rusinov dimers and chains
- Kondo Screening and Indirect Magnetic Exchange through a Conventional Superconductor Studied by the Density-Matrix Renormalization Group