Influence of Magnetic Ordering between Cr Adatoms on the Yu-Shiba-Rusinov States of the β-Bi2Pd Superconductor
Entity
UAM. Departamento de Física de la Materia CondensadaPublisher
American Physical SocietyDate
2018-04-18Citation
10.1103/PhysRevLett.120.167001
Physical Review Letters 120.16 (2018): 167001
ISSN
1079-7114 (online); 0031-9007 (print)DOI
10.1103/PhysRevLett.120.167001Funded by
We thank Javier Zaldivar and Joeri de Bruijckere for developing the deconvolution process and Sebastian Bergeret for discussions. D.-J. C. and J. I. P. thank the European Union for support under the H2020-MSCA-IF-2014 Marie-Curie Individual Fellowship program (Proposal No. 654469), Spanish MINECO (MAT2016-78293-C6-1-R), Diputacion Foral de Gipuzkoa for Grant No. 64/15, and the European Regional Development Fund (ERDF). N. L. thanks Spanish MINECO (Grant No. MAT2015-66888-C3-2-R). M. M. U. acknowledges Spanish MINECO (MAT2014-60996-R). E. H., I. G., and H. S. acknowledge FIS2014-54498-R and MDM-2014-0377, COST MP16218 nanocohybri, ERC PNICTEYES Grant Agreement No. 679080, and Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS (Colombia), Programa doctorados en el exterior and convocatoria 568-2012, as well as Comunidad de Madrid through program Nanofrontmag-CM (Grant No. S2013/MIT-2850)Project
info:eu-repo/grantAgreement/EC/H2020/654469//EU//ARTE; Gobierno de España. MAT2016-78293-C6-1-R; Gobierno de España. MAT2015-66888-C3-2-R; Gobierno de España. MAT2014-60996-R; Gobierno de España. FIS2014-54498-R; Gobierno de España. MDM-2014-0377; info:eu-repo/grantAgreement/EC/H2020/679080/EU//PNICTEYES; Comunidad de Madrid. S2013/MIT-2850/NANOFRONTMAG-CMEditor's Version
https://doi.org/10.1103/PhysRevLett.120.167001Subjects
Exchange interaction; Impurities in superconductors; Magnetic interactions; Superconducting phase transition; Antiferromagnetism; Atoms; Low-temperature superconductors; Surfaces; FísicaRights
© 2018 American Physical SocietyAbstract
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
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Google Scholar:Choi, Deung Jang
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Fernández, Carlos García
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Herrera Vasco, Edwin
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Rubio-Verdú, Carmen
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Ugeda, Miguel M.
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Guillamón Gómez, Isabel
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Suderow Rodríguez, Hermann Jesús
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Pascual, José Ignacio
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Lorente, Nicolás
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