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.
arXiv comment16 pages including supplementary information; 4 figures
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Cited by in corpus (14)
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