Influence of Magnetic Ordering between Cr Adatoms on the Yu-Shiba-Rusinov States of the β-Bi_{2}Pd Superconductor

Physical Review Letters
Deung-Jang ChoiNicolás Lorente

Abstract

We show that the magnetic ordering of coupled atomic dimers on a superconductor is revealed by their intragap spectral features. Chromium atoms on the superconductor β-Bi_{2}Pd surface display Yu-Shiba-Rusinov bound states, detected as pairs of intragap excitations in tunneling spectra. By means of atomic manipulation with a scanning tunneling microscope's tip, we form Cr dimers with different arrangements and find that their intragap features appear either shifted or split with respect to single atoms. These spectral variations are associated with the magnetic coupling, ferromagnetic or antiferromagnetic, of the dimer, as confirmed by density functional theory simulations. The striking qualitative differences between the observed tunneling spectra prove that intragap Shiba states are extremely sensitive to the magnetic ordering on the atomic scale.

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May 10, 2017·Nature Communications·Deung-Jang ChoiJose Ignacio Pascual
Mar 14, 2018·Nano Letters·Shawulienu KezilebiekePeter Liljeroth
May 15, 2018·Physical Review Letters·Michael RubyKatharina J Franke

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Citations

Sep 13, 2020·Nature Communications·Howon KimRoland Wiesendanger
Apr 3, 2021·Nature Communications·Philip BeckRoland Wiesendanger
Mar 31, 2021·Proceedings of the National Academy of Sciences of the United States of America·Hao DingAli Yazdani
Dec 18, 2019·Nano Letters·Eva LiebhaberKatharina J Franke
Sep 21, 2021·Nano Letters·Olivér KürtössySzabolcs Csonka

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