2024-03-28T08:39:45Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1780832019-04-02T01:04:31Zcom_10261_115com_10261_3col_10261_368
00925njm 22002777a 4500
dc
Choi, Deung-Jang
author
García-Fernández, Carlos
author
Herrera, Edwin
author
Rubio-Verdú, Carmen
author
Ugeda, Miguel M.
author
Guillamón, Isabel
author
Suderow, Hermann
author
Pascual, José I.
author
Lorente, Nicolás
author
2018
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−Bi2Pd 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.
Physical Review Letters 120(16): 167001 (2018)
0031-9007
http://hdl.handle.net/10261/178083
10.1103/PhysRevLett.120.167001
1079-7114
http://dx.doi.org/10.13039/501100000781
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/100012818
29756947
Influence of magnetic ordering between Cr adatoms on the Yu-Shiba-Rusinov states of the β−Bi2 Pd superconductor