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Electron transport and microwave dynamics of hybrid Nb/Au/CaSrCuO/YBaCuO planar Josephson junctions

Constantinian, K. Y. ; Ovsyannikov, G. A. ; Kislinskii, Y. V. ; Shadrin, A. V. ; Borisenko, I. V. ; Komissinskiy, P. V. ; Zaitsev, A. V. ; Mygind, J. ; Winkler, D. (2024)
Electron transport and microwave dynamics of hybrid Nb/Au/CaSrCuO/YBaCuO planar Josephson junctions.
In: Journal of Physics: Conference Series, 2010, 234 (4)
doi: 10.26083/tuprints-00020664
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Electron transport and microwave dynamics of hybrid Nb/Au/CaSrCuO/YBaCuO planar Josephson junctions
Language: English
Date: 12 February 2024
Place of Publication: Darmstadt
Year of primary publication: 1 June 2010
Publisher: IOP Publishing
Journal or Publication Title: Journal of Physics: Conference Series
Volume of the journal: 234
Issue Number: 4
Collation: 5 Seiten
DOI: 10.26083/tuprints-00020664
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

We report on measurements of dc electron transport and microwave dynamics of thin film hybrid Josephson junctions with an oxide antiferromagnetic interlayer. The base superconducting electrode YBaCuO and the antiferromagnetic (AF) interlayer CaSrCuO (with thickness d = 20 – 70 nm) were grown by laser ablation on NdGaO₃ substrates. I-V curves were well fitted to RSJ model and had no excess current, ICRN products were of order 0.2 mV at T=4.2 K. We did not observe any noticeable reduction of ICRN with increasing d. Such "tunnellike" behaviour also resulted in appearance of singularities on I-V curve when magnetic field was applied. Oscillating with microwave power integer and half-integer Shapiro steps were registered along with sub-harmonic detector response. Moreover, for some of junctions a "devil" staircase structure was observed on I-V curves and giant noise-like signals were measured in 1-2 GHz band at the certain levels of microwave power. Observed features, noise performance and the impact of the second harmonic in current-phase relation on junction dynamics are discussed taking into account data for structures without AF interlayer.

Identification Number: Artikel-ID: 042004
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-206645
Additional Information:

9th European Conference on Applied Superconductivity (EUCAS 09)

Classification DDC: 500 Science and mathematics > 500 Science
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
Date Deposited: 12 Feb 2024 14:45
Last Modified: 10 May 2024 08:13
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20664
PPN: 517660628
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