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Magnetic anisotropy in Shiba bound states across a quantum phase transition
The exchange coupling between magnetic adsorbates and a superconducting substrate leads to Shiba states inside the superconducting energy gap and a Kondo resonance outside the gap. The exchange coupling strength determines whether the quantum many-body ground state is a Kondo singlet or a singlet of...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Pub. Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4674822/ https://www.ncbi.nlm.nih.gov/pubmed/26603561 http://dx.doi.org/10.1038/ncomms9988 |
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author | Hatter, Nino Heinrich, Benjamin W. Ruby, Michael Pascual, Jose I. Franke, Katharina J. |
author_facet | Hatter, Nino Heinrich, Benjamin W. Ruby, Michael Pascual, Jose I. Franke, Katharina J. |
author_sort | Hatter, Nino |
collection | PubMed |
description | The exchange coupling between magnetic adsorbates and a superconducting substrate leads to Shiba states inside the superconducting energy gap and a Kondo resonance outside the gap. The exchange coupling strength determines whether the quantum many-body ground state is a Kondo singlet or a singlet of the paired superconducting quasiparticles. Here we use scanning tunnelling spectroscopy to identify the different quantum ground states of manganese phthalocyanine on Pb(111). We observe Shiba states, which are split into triplets by magnetocrystalline anisotropy. Their characteristic spectral weight yields an unambiguous proof of the nature of the quantum ground state. Our results provide experimental insights into the phase diagram of a magnetic impurity on a superconducting host and shine light on the effects induced by magnetic anisotropy on many-body interactions. |
format | Online Article Text |
id | pubmed-4674822 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-46748222015-12-21 Magnetic anisotropy in Shiba bound states across a quantum phase transition Hatter, Nino Heinrich, Benjamin W. Ruby, Michael Pascual, Jose I. Franke, Katharina J. Nat Commun Article The exchange coupling between magnetic adsorbates and a superconducting substrate leads to Shiba states inside the superconducting energy gap and a Kondo resonance outside the gap. The exchange coupling strength determines whether the quantum many-body ground state is a Kondo singlet or a singlet of the paired superconducting quasiparticles. Here we use scanning tunnelling spectroscopy to identify the different quantum ground states of manganese phthalocyanine on Pb(111). We observe Shiba states, which are split into triplets by magnetocrystalline anisotropy. Their characteristic spectral weight yields an unambiguous proof of the nature of the quantum ground state. Our results provide experimental insights into the phase diagram of a magnetic impurity on a superconducting host and shine light on the effects induced by magnetic anisotropy on many-body interactions. Nature Pub. Group 2015-11-25 /pmc/articles/PMC4674822/ /pubmed/26603561 http://dx.doi.org/10.1038/ncomms9988 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Hatter, Nino Heinrich, Benjamin W. Ruby, Michael Pascual, Jose I. Franke, Katharina J. Magnetic anisotropy in Shiba bound states across a quantum phase transition |
title | Magnetic anisotropy in Shiba bound states across a quantum phase transition |
title_full | Magnetic anisotropy in Shiba bound states across a quantum phase transition |
title_fullStr | Magnetic anisotropy in Shiba bound states across a quantum phase transition |
title_full_unstemmed | Magnetic anisotropy in Shiba bound states across a quantum phase transition |
title_short | Magnetic anisotropy in Shiba bound states across a quantum phase transition |
title_sort | magnetic anisotropy in shiba bound states across a quantum phase transition |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4674822/ https://www.ncbi.nlm.nih.gov/pubmed/26603561 http://dx.doi.org/10.1038/ncomms9988 |
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