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arXiv · 2302.00966

Coupling of Yu-Shiba-Rusinov states in 1D chains of Fe atoms on Nb(110)

Felix Friedrich·Robin Boshuis·Matthias Bode·Artem Odobesko
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Abstract

The hybridization of Yu-Shiba-Rusinov states in dimers of magnetic impurities leads to molecular-like bonding and antibonding modes. In many-impurity systems, the interaction gives rise to YSR bands and can even result in the formation of a topologically non-trivial superconducting state, characterized by Majorana fermions at the edges of the system. To obtain a more detailed understanding of these interactions, we investigate the coupling of YSR states in short one-dimensional Fe chains on clean Nb(110). We observe a splitting of the single-atom YSR peaks into multiple states with even or odd spatial symmetry and identify a peculiar dependence of the even and odd states' energy position on the chain length.

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Felix Friedrich, Robin Boshuis, Matthias Bode, Artem Odobesko. 2023-02-02. Coupling of Yu-Shiba-Rusinov states in 1D chains of Fe atoms on Nb(110). https://doi.org/10.1103/physrevb.103.235437

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