Andreev spectroscopy of CrO2 thin films on TiO2 and Al2O3
Artikel i vetenskaplig tidskrift, 2013

Here we analyse the spectroscopic information gathered at a number of single CrO2/Pb interfaces. We examine thin films requiring additional interfacial layers to generate long-range spin triplet proximity effect superconductivity (CrO2/TiO2) or not (CrO 2/Al2O3). We analyse the data using two theoretical models and explore the use of a parameter-free method to determine the agreement between the models and experimental observations, showing the necessary temperature range that would be required to make a definitive statement. The use of the excess current as a further tool to distinguish between models is also examined. The analysis of the spectra demonstrates that the temperature dependence of the normalised zero-bias conductance is independent of the substrate onto which the films are grown. This result has important implications for the engineering of interfaces required for the long-range spin triplet proximity effect. © Copyright EPLA, 2013.


K.A. Yates

Imperial College London

M.S. Anwar

Universiteit Leiden

Kyoto University

J.F.M. Aarts

Universiteit Leiden

O. Conde

Instituto de Ciencia e Engenharia de Materials Superficies

M. Eschrig

Royal Holloway University of London

Tomas Löfwander

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

L.F. Cohen

Imperial College London

Europhysics Letters

0295-5075 (ISSN) 1286-4854 (eISSN)

Vol. 103 6


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