Journal
PHYSICAL REVIEW LETTERS
Volume 128, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.128.036801
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Funding
- QuantERA grant TOPOQUANT
- Deutsche Forschungsgemeinschaft [CRC 183, CRC 910]
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This study demonstrates that dilute Yu-Shiba-Rusinov (YSR) chains are not only promising for realizing Majorana end states, but also a versatile platform for quantum magnetism and correlated electron dynamics.
Chains of magnetic adatoms on superconductors have been discussed as promising systems for realizing Majorana end states. Hem, 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 t - J 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.
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