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Band-resolved Caroli–de Gennes–Matricon states of multiple-flux-quanta vortices in a multiband superconductor

Superconductors are of type I or II depending on whether they form an Abrikosov vortex lattice. Although bulk lead (Pb) is classified as a prototypical type-I superconductor, we show that its two-band superconductivity allows for single-flux-quantum and multiple-flux-quanta vortices in the intermedi...

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Autores principales: Gozlinski, Thomas, Li, Qili, Heid, Rolf, Nemoto, Ryohei, Willa, Roland, Yamada, Toyo Kazu, Schmalian, Jörg, Wulfhekel, Wulf
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10491140/
https://www.ncbi.nlm.nih.gov/pubmed/37683002
http://dx.doi.org/10.1126/sciadv.adh9163
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author Gozlinski, Thomas
Li, Qili
Heid, Rolf
Nemoto, Ryohei
Willa, Roland
Yamada, Toyo Kazu
Schmalian, Jörg
Wulfhekel, Wulf
author_facet Gozlinski, Thomas
Li, Qili
Heid, Rolf
Nemoto, Ryohei
Willa, Roland
Yamada, Toyo Kazu
Schmalian, Jörg
Wulfhekel, Wulf
author_sort Gozlinski, Thomas
collection PubMed
description Superconductors are of type I or II depending on whether they form an Abrikosov vortex lattice. Although bulk lead (Pb) is classified as a prototypical type-I superconductor, we show that its two-band superconductivity allows for single-flux-quantum and multiple-flux-quanta vortices in the intermediate state at millikelvin temperature. Using scanning tunneling microscopy, the winding number of individual vortices is determined from the real space wave function of its Caroli–de Gennes–Matricon bound states. This generalizes the topological index theorem put forward by Volovik for isotropic electronic states to realistic electronic structures. In addition, the bound states due to the two superconducting bands of Pb can be separately detected and the two gaps close independently inside vortices. This yields strong evidence for a low interband coupling.
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spelling pubmed-104911402023-09-09 Band-resolved Caroli–de Gennes–Matricon states of multiple-flux-quanta vortices in a multiband superconductor Gozlinski, Thomas Li, Qili Heid, Rolf Nemoto, Ryohei Willa, Roland Yamada, Toyo Kazu Schmalian, Jörg Wulfhekel, Wulf Sci Adv Physical and Materials Sciences Superconductors are of type I or II depending on whether they form an Abrikosov vortex lattice. Although bulk lead (Pb) is classified as a prototypical type-I superconductor, we show that its two-band superconductivity allows for single-flux-quantum and multiple-flux-quanta vortices in the intermediate state at millikelvin temperature. Using scanning tunneling microscopy, the winding number of individual vortices is determined from the real space wave function of its Caroli–de Gennes–Matricon bound states. This generalizes the topological index theorem put forward by Volovik for isotropic electronic states to realistic electronic structures. In addition, the bound states due to the two superconducting bands of Pb can be separately detected and the two gaps close independently inside vortices. This yields strong evidence for a low interband coupling. American Association for the Advancement of Science 2023-09-08 /pmc/articles/PMC10491140/ /pubmed/37683002 http://dx.doi.org/10.1126/sciadv.adh9163 Text en Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) , which permits which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Physical and Materials Sciences
Gozlinski, Thomas
Li, Qili
Heid, Rolf
Nemoto, Ryohei
Willa, Roland
Yamada, Toyo Kazu
Schmalian, Jörg
Wulfhekel, Wulf
Band-resolved Caroli–de Gennes–Matricon states of multiple-flux-quanta vortices in a multiband superconductor
title Band-resolved Caroli–de Gennes–Matricon states of multiple-flux-quanta vortices in a multiband superconductor
title_full Band-resolved Caroli–de Gennes–Matricon states of multiple-flux-quanta vortices in a multiband superconductor
title_fullStr Band-resolved Caroli–de Gennes–Matricon states of multiple-flux-quanta vortices in a multiband superconductor
title_full_unstemmed Band-resolved Caroli–de Gennes–Matricon states of multiple-flux-quanta vortices in a multiband superconductor
title_short Band-resolved Caroli–de Gennes–Matricon states of multiple-flux-quanta vortices in a multiband superconductor
title_sort band-resolved caroli–de gennes–matricon states of multiple-flux-quanta vortices in a multiband superconductor
topic Physical and Materials Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10491140/
https://www.ncbi.nlm.nih.gov/pubmed/37683002
http://dx.doi.org/10.1126/sciadv.adh9163
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