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- W1544093886 abstract "We study the magnetic anisotropy effects on the localized subgap excitations induced by quantum impurities coupled to a superconducting host. We establish the ground-state phase diagrams for single-channel and two-channel high-spin Kondo impurities; they unveil surprising complexity that results from the (multistage) Kondo screening in competition with the superconducting correlations and the magnetic anisotropy splitting of the spin multiplets. We discuss the possibility of detecting the Zeeman splitting of the subgap states, which would provide an interesting spectroscopic tool for studying the magnetism on the single-atom level. We also study the problem of two impurities coupled by the Heisenberg exchange interaction, and we follow the evolution of the subgap states for both antiferromagnetic and ferromagnetic coupling. For sufficiently strong antiferromagnetic coupling, the impurities bind into a singlet state that is nonmagnetic, thus the subgap states move to the edge of the gap and can no longer be discerned. For ferromagnetic coupling, some excited states remain present inside the gap." @default.
- W1544093886 created "2016-06-24" @default.
- W1544093886 creator A5047715279 @default.
- W1544093886 creator A5062380534 @default.
- W1544093886 creator A5071703980 @default.
- W1544093886 date "2011-02-22" @default.
- W1544093886 modified "2023-09-23" @default.
- W1544093886 title "Effects of magnetic anisotropy on the subgap excitations induced by quantum impurities in a superconducting host" @default.
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