Low Temperature Physics: 44, 257 (2018); https://doi.org/10.1063/1.5030447
Fizika Nizkikh Temperatur: Volume 44, Number 4 (April 2018), p. 343-356    ( to contents , go back )

Anatomy of point-contact Andreev reflection spectroscopy from the experimental point of view

Yu.G. Naidyuk

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., Kharkiv 61103, Ukraine
E-mail: naidyuk@ilt.kharkov.ua

K. Gloos

Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FIN-20014 Turku, Finland

Turku University Centre for Materials and Surfaces (MatSurf), FIN-20014 Turku, Finland

Received October 11, 2017


We review applications of point-contact Andreev-reflection spectroscopy to study elemental superconductors, where theoretical conditions for the smallness of the point-contact size with respect to the characteristic lengths in the superconductor can be satisfied. We discuss existing theoretical models and identify new issues that have to be solved, especially when applying this method to investigate more complex superconductors. We will also demonstrate that some aspects of point-contact Andreev-reflection spectroscopy still need to be addressed even when investigating ordinary metals.

PACS: 74.45.+с Proximity effects; Andreev reflection; SN and SNS junctions;
PACS: 85.30.Hi Surface barrier, boundary, and point contact devices.

Key words: point contact, Andreev reflection, spin polarization.

Published online: February 26, 2018

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