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Article Dans Une Revue Physical Review Letters Année : 2013

Scanning Tunneling Spectroscopy Study of the Proximity Effect in a Disordered Two-Dimensional Metal

Résumé

The proximity effect between a superconductor and a highly diffusive two-dimensional metal is revealed in a scanning tunneling spectroscopy experiment. The in situ elaborated samples consist of superconducting single crystalline Pb islands interconnected by a nonsuperconducting atomically thin disordered Pb wetting layer. In the vicinity of each superconducting island the wetting layer acquires specific tunneling characteristics which reflect the interplay between the proximity-induced superconductivity and the inherent electron correlations of this ultimate diffusive two-dimensional metal. The observed spatial evolution of the tunneling spectra is accounted for theoretically by combining the Usadel equations with the theory of dynamical Coulomb blockade; the relevant length and energy scales are extracted and found in agreement with available experimental data. DOI: 10.1103/PhysRevLett.110.157003

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hal-01233581 , version 1 (25-11-2015)

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L. Serrier-Garcia, J. C. Cuevas, Ten Cren, Christophe Brun, V. Cherkez, et al.. Scanning Tunneling Spectroscopy Study of the Proximity Effect in a Disordered Two-Dimensional Metal. Physical Review Letters, 2013, 110 (15), pp.157003. ⟨10.1103/PhysRevLett.110.157003⟩. ⟨hal-01233581⟩
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