TY - JOUR
T1 - Josephson junctions based on amorphous MoGe
T2 - Prospects for use in superconducting electronics
AU - Nevirkovets, I. P.
AU - Belogolovskii, M. A.
AU - Ketterson, J. B.
N1 - Funding Information:
This research received support from NSF Grant DMR 1905742. This work made use of the NUFAB facility of Northwestern University’s NUANCE Center, which has received support from the SHyNE Resource (NSF ECCS-2025633), the IIN, and Northwestern’s MRSEC program (NSF DMR-1720139). M A Belogolovskii acknowledges support from the Fundamental Research Programme funded by the Ministry of Education and Science of Ukraine (Project No. 0120U102059).
Publisher Copyright:
© 2022 IOP Publishing Ltd.
PY - 2022/3
Y1 - 2022/3
N2 - We have fabricated and characterized all-MoGe Josephson junctions with a very thin Al/AlO x/(Al) barrier, where the amorphous MoGe films exhibit superconducting transition temperatures up to 7 K. Due to the uniformity of the surface morphology of the MoGe films, the junctions demonstrate high uniformity of their tunneling properties. The experimental data on the temperature dependence of the subgap current agree well with theoretical calculations. The results obtained imply that Josephson tunnel junctions based on amorphous superconductors are promising candidates for use in superconducting electronics, especially in applications requiring multiple stacked junctions or the creation of a nonequilibrium quasiparticle distribution.
AB - We have fabricated and characterized all-MoGe Josephson junctions with a very thin Al/AlO x/(Al) barrier, where the amorphous MoGe films exhibit superconducting transition temperatures up to 7 K. Due to the uniformity of the surface morphology of the MoGe films, the junctions demonstrate high uniformity of their tunneling properties. The experimental data on the temperature dependence of the subgap current agree well with theoretical calculations. The results obtained imply that Josephson tunnel junctions based on amorphous superconductors are promising candidates for use in superconducting electronics, especially in applications requiring multiple stacked junctions or the creation of a nonequilibrium quasiparticle distribution.
KW - Josephson tunnel junctions
KW - amorphous MoGe superconductor
KW - device fabrication
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U2 - 10.1088/1361-6668/ac4b00
DO - 10.1088/1361-6668/ac4b00
M3 - Article
AN - SCOPUS:85125434800
VL - 35
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 3
M1 - 035008
ER -