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Real space manifestations of coherent screening in atomic scale Kondo lattices

The interaction among magnetic moments screened by conduction electrons drives quantum phase transitions between magnetically ordered and heavy-fermion ground states. Here, starting from isolated magnetic impurities in the Kondo regime, we investigate the formation of the finite size analogue of a h...

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Autores principales: Moro-Lagares, María, Korytár, Richard, Piantek, Marten, Robles, Roberto, Lorente, Nicolás, Pascual, Jose I., Ibarra, M. Ricardo, Serrate, David
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6525169/
https://www.ncbi.nlm.nih.gov/pubmed/31101815
http://dx.doi.org/10.1038/s41467-019-10103-5
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author Moro-Lagares, María
Korytár, Richard
Piantek, Marten
Robles, Roberto
Lorente, Nicolás
Pascual, Jose I.
Ibarra, M. Ricardo
Serrate, David
author_facet Moro-Lagares, María
Korytár, Richard
Piantek, Marten
Robles, Roberto
Lorente, Nicolás
Pascual, Jose I.
Ibarra, M. Ricardo
Serrate, David
author_sort Moro-Lagares, María
collection PubMed
description The interaction among magnetic moments screened by conduction electrons drives quantum phase transitions between magnetically ordered and heavy-fermion ground states. Here, starting from isolated magnetic impurities in the Kondo regime, we investigate the formation of the finite size analogue of a heavy Fermi liquid. We build regularly-spaced chains of Co adatoms on a metallic surface by atomic manipulation. Scanning tunneling spectroscopy is used to obtain maps of the Kondo resonance intensity with sub-atomic resolution. For sufficiently small interatomic separation, the spatial distribution of Kondo screening does not coincide with the position of the adatoms. It also develops enhancements at both edges of the chains. Since we can rule out any other interaction between Kondo impurities, this is explained in terms of the indirect hybridization of the Kondo orbitals mediated by a coherent electron gas, the mechanism that causes the emergence of heavy quasiparticles in the thermodynamic limit.
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spelling pubmed-65251692019-05-20 Real space manifestations of coherent screening in atomic scale Kondo lattices Moro-Lagares, María Korytár, Richard Piantek, Marten Robles, Roberto Lorente, Nicolás Pascual, Jose I. Ibarra, M. Ricardo Serrate, David Nat Commun Article The interaction among magnetic moments screened by conduction electrons drives quantum phase transitions between magnetically ordered and heavy-fermion ground states. Here, starting from isolated magnetic impurities in the Kondo regime, we investigate the formation of the finite size analogue of a heavy Fermi liquid. We build regularly-spaced chains of Co adatoms on a metallic surface by atomic manipulation. Scanning tunneling spectroscopy is used to obtain maps of the Kondo resonance intensity with sub-atomic resolution. For sufficiently small interatomic separation, the spatial distribution of Kondo screening does not coincide with the position of the adatoms. It also develops enhancements at both edges of the chains. Since we can rule out any other interaction between Kondo impurities, this is explained in terms of the indirect hybridization of the Kondo orbitals mediated by a coherent electron gas, the mechanism that causes the emergence of heavy quasiparticles in the thermodynamic limit. Nature Publishing Group UK 2019-05-17 /pmc/articles/PMC6525169/ /pubmed/31101815 http://dx.doi.org/10.1038/s41467-019-10103-5 Text en © The Author(s) 2019, corrected publication 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Moro-Lagares, María
Korytár, Richard
Piantek, Marten
Robles, Roberto
Lorente, Nicolás
Pascual, Jose I.
Ibarra, M. Ricardo
Serrate, David
Real space manifestations of coherent screening in atomic scale Kondo lattices
title Real space manifestations of coherent screening in atomic scale Kondo lattices
title_full Real space manifestations of coherent screening in atomic scale Kondo lattices
title_fullStr Real space manifestations of coherent screening in atomic scale Kondo lattices
title_full_unstemmed Real space manifestations of coherent screening in atomic scale Kondo lattices
title_short Real space manifestations of coherent screening in atomic scale Kondo lattices
title_sort real space manifestations of coherent screening in atomic scale kondo lattices
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6525169/
https://www.ncbi.nlm.nih.gov/pubmed/31101815
http://dx.doi.org/10.1038/s41467-019-10103-5
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