Superconducting density of states and band structure at the surface of the candidate topological superconductor Au2 Pb

The electronic band structure of Au2Pb has a Dirac cone which gaps when undergoing a structural transition into a low temperature superconducting phase. This suggests that the superconducting phase (Tc = 1.1 K) might hold topological properties at the surface. Here we make Scanning Tunneling Microsc...

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Detalles Bibliográficos
Autores: Martín Vega, Francisco, Herrera Vasco, Edwin, Wu, Beilun, Barrena Escolar, Víctor, Mompeán, Federico, García-Hernández, Mar, Canfield, Paul C., Black-Schaffer, Annica M., Baldoví, José J., Guillamón Gómez, Isabel, Suderow Rodríguez, Hermann Jesús
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/706262
Acceso en línea:http://hdl.handle.net/10486/706262
https://dx.doi.org/10.1103/PhysRevResearch.4.023241
Access Level:acceso abierto
Palabra clave:Band Structure
Binary Alloys
Gold Alloys
Lead Alloys
Scanning Ttunneling Microscopy
Topology
Física
Descripción
Sumario:The electronic band structure of Au2Pb has a Dirac cone which gaps when undergoing a structural transition into a low temperature superconducting phase. This suggests that the superconducting phase (Tc = 1.1 K) might hold topological properties at the surface. Here we make Scanning Tunneling Microscopy experiments on the surface of superconducting Au2Pb. We measure the superconducting gap and find a sizable superconducting density of states at the Fermi level. We discuss possible origins for this finding in terms of superconductivity induced into surface states

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