Chapter

Inhomogeneous superconductors: the superconducting proximity effect

E. L. Wolf

in Principles of Electron Tunneling Spectroscopy

Second edition

Published in print November 2011 | ISBN: 9780199589494
Published online January 2012 | e-ISBN: 9780191731334 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199589494.003.0005

Series: International Series of Monographs on Physics

Inhomogeneous superconductors: the superconducting proximity effect

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The superconducting proximity effect is based on the continuity of the pair wave function allowing pairs to flow across a specular SN boundary resulting in superconducting effects in the N region. The inversion of tunnelling data derived from two-layer NS proximity electrodes is treated based on the specular theory of Arnold. The role of Andreev scattering is explained. McMillan's model bilayer proximity model is treated. The useful simplifications of the underlying Eliashberg theory as accomplished by Eilenberger and later by Usadel are described. The spatial and superconducting phase dependences of the tunneling spectra in proximity structures as measured by le Sueur et al. are presented. The Proximity Electron Tunneling Spectroscopy (PETS) method of Arnold and Wolf is also described.

Keywords: PETS; Arnold; Usadel; proximity; NS bilayers; le Sueur phase AFM/STM pair

Chapter.  18496 words.  Illustrated.

Subjects: Condensed Matter Physics

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