Andreev spectroscopy of CrO2 thin films on TiO2 and Al2O3. / Yates, Karen A.; Anwar, M. S. ; Aarts, Jan; Conde, O.; Eschrig, Matthias; Lofwander, Tomas; Cohen, Lesley F.
In: Europhysics Letters, Vol. 103, 67005, 07.10.2013.Research output: Contribution to journal › Letter › peer-review
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 (CrO2/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.
Original language | English |
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Article number | 67005 |
Number of pages | 5 |
Journal | Europhysics Letters |
Volume | 103 |
DOIs | |
Publication status | Published - 7 Oct 2013 |
ID: 17828508