Observation of Yu–Shiba–Rusinov States in Superconducting Graphene
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Título: | Observation of Yu–Shiba–Rusinov States in Superconducting Graphene |
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Autor/es: | Cortés-del Río, Eva | Lado, Jose L. | Cherkez, Vladimir | Mallet, Pierre | Veuillen, Jean-Yves | Cuevas, Juan Carlos | Gómez-Rodríguez, José María | Fernández-Rossier, Joaquín | Brihuega, Iván |
Grupo/s de investigación o GITE: | Grupo de Nanofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Graphene | Grain boundaries | Magnetism | Superconductivity | Topology | Yu–Shiba–Rusinov states |
Área/s de conocimiento: | Física de la Materia Condensada |
Fecha de publicación: | 23-abr-2021 |
Editor: | Wiley-VCH GmbH |
Cita bibliográfica: | Advanced Materials. 2021, 33(22): 2008113. https://doi.org/10.1002/adma.202008113 |
Resumen: | When magnetic atoms are inserted inside a superconductor, the superconducting order is locally depleted as a result of the antagonistic nature of magnetism and superconductivity. Thereby, distinctive spectral features, known as Yu–Shiba–Rusinov states, appear inside the superconducting gap. The search for Yu–Shiba–Rusinov states in different materials is intense, as they can be used as building blocks to promote Majorana modes suitable for topological quantum computing. Here, the first observation of Yu–Shiba–Rusinov states in graphene, a non-superconducting 2D material, and without the participation of magnetic atoms, is reported. Superconductivity in graphene is induced by proximity effect brought by adsorbing nanometer-scale superconducting Pb islands. Using scanning tunneling microscopy and spectroscopy the superconducting proximity gap is measured in graphene, and Yu–Shiba–Rusinov states are visualized in graphene grain boundaries. The results reveal the very special nature of those Yu–Shiba–Rusinov states, which extends more than 20 nm away from the grain boundaries. These observations provide the long-sought experimental confirmation that graphene grain boundaries host local magnetic moments and constitute the first observation of Yu–Shiba–Rusinov states in a chemically pure system. |
Patrocinador/es: | This work was supported by AEI and FEDER under projects MAT2016-80907-P and MAT2016-77852-C2-2-R (AEI/FEDER, UE), by the Fundación Ramón Areces, and by the Comunidad de Madrid NMAT2D-CM program under grant S2018/NMT-4511. J.F.R. acknowledges financial support European Regional Development Fund Project No. NORTE-01-50145- FEDER-000019, and the UTAPEXPL/NTec/0046/2017 projects, as well as Generalitat Valenciana funding Prometeo2017/139 and MINECO Spain (Grant No. MAT2016-78625-C2). J.L.L is grateful for financial support from the Academy of Finland Projects Nos. 331342 and 336243. |
URI: | http://hdl.handle.net/10045/115195 |
ISSN: | 0935-9648 (Print) | 1521-4095 (Online) |
DOI: | 10.1002/adma.202008113 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2021 Wiley-VCH GmbH |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1002/adma.202008113 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Cortes-del-Rio_etal_2021_AdvMater_final.pdf | Versión final (acceso restringido) | 5,47 MB | Adobe PDF | Abrir Solicitar una copia |
Cortes-del-Rio_etal_2021_AdvMater_preprint.pdf | Preprint (acceso abierto) | 2,12 MB | Adobe PDF | Abrir Vista previa |
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