We describe the Point Contact Spectroscopy technique for the characterization of superconducting materials. By pushing a metallic tip on the superconducting surface, it is possible to tune the interface properties, from a perfect transparent barrier up to the case of insulating barrier separating the two electrodes of a tunnel junction. The experiments can be described in the framework of Blonder-Tinkham-Klapwijck theory. In this paper, we show both cases, observed on two different kinds of superconductors and compare the results with the theory.

Point contact spectroscopy: a powerful technique for the low temperature characterization of superconducting materials

Romano, P
;
Avitabile, F;Giubileo, F
2022-01-01

Abstract

We describe the Point Contact Spectroscopy technique for the characterization of superconducting materials. By pushing a metallic tip on the superconducting surface, it is possible to tune the interface properties, from a perfect transparent barrier up to the case of insulating barrier separating the two electrodes of a tunnel junction. The experiments can be described in the framework of Blonder-Tinkham-Klapwijck theory. In this paper, we show both cases, observed on two different kinds of superconductors and compare the results with the theory.
2022
978-1-6654-1076-2
Superconductivity
Point contact spectroscopy
Tunnel junctions
Low temperature measurements
Density of states
Order parameter
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12070/59339
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