Superconducting density of states and band structure at the surface of the candidate topological superconductor Au_{2}Pb

Superconducting density of states and band structure at the surface of the candidate topological superconductor Au_{2}Pb

The electronic band structure of Au_{2}Pb has a Dirac cone which gaps when undergoing a structural transition into a low temperature superconducting phase. This suggests that the superconducting phase (T_{c}=1.1 K) might hold topological properties at the surface. Here we make Scanning Tunneling Mic...

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Bibliographic Details
Main Authors: Francisco Martín-Vega, Edwin Herrera, Beilun Wu, Víctor Barrena, Federico Mompeán, Mar García-Hernández, Paul C. Canfield, Annica M. Black-Schaffer, José J. Baldoví, Isabel Guillamón, Hermann Suderow
Format: Article
Language:English
Published: American Physical Society 2022-06-01
Series:Physical Review Research
Online Access:http://doi.org/10.1103/PhysRevResearch.4.023241
Description
Summary:The electronic band structure of Au_{2}Pb has a Dirac cone which gaps when undergoing a structural transition into a low temperature superconducting phase. This suggests that the superconducting phase (T_{c}=1.1 K) might hold topological properties at the surface. Here we make Scanning Tunneling Microscopy experiments on the surface of superconducting Au_{2}Pb. 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.
ISSN:2643-1564

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