Annalen der Physik, volume 532, issue 8, pages 2000273
Proximity‐Effect‐Induced Superconductivity in Nb/Sb 2 Te 3 ‐Nanoribbon/Nb Junctions
Jinzhong Zhang
1, 2, 3
,
Abdur Rehman Jalil
1, 2
,
Pok Lam Tse
4
,
Jonas Kölzer
1, 2
,
Daniel Rosenbach
1, 2
,
Helen Valencia
5
,
Martina Luysberg
5
,
Martin Mikulics
1, 2
,
G Panaitov
6
,
Detlev Grützmacher
1, 2
,
Z. Hu
3
,
J G Lu
4
,
Thomas Schäpers
1, 2
2
Publication type: Journal Article
Publication date: 2020-07-09
Journal:
Annalen der Physik
Quartile SCImago
Q2
Quartile WOS
Q3
Impact factor: 2.4
ISSN: 00033804, 15213889
General Physics and Astronomy
Abstract
Nanohybrid superconducting junctions using antimony telluride (Sb2Te3) topological insulator nanoribbons and Nb superconducting electrodes are fabricated using electron beam lithography and magnetron sputtering. The effects of bias current, temperature, and magnetic field on the transport properties of the junctions in a four‐terminal measurement configuration are investigated. Two features are observed. First, the formation of a Josephson weak‐link junction. The junction is formed by proximity‐induced areas in the nanoribbon right underneath the inner Nb electrodes which are connected by the few tens of nanometers short Sb2Te3 bridge. At 0.5 K a critical current of 0.15 µA is observed. The decrease of the supercurrent with temperature is explained in the framework of a diffusive junction. Furthermore, the Josephson supercurrent is found to decrease monotonously with the magnetic field indicating that the structure is in the small‐junction limit. As a second feature, a transition is also observed in the differential resistance at larger bias currents and larger magnetic fields, which is attributed to the suppression of the proximity‐induced superconductive state in the nanoribbon area underneath the Nb electrodes.
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Zhang J. et al. Proximity‐Effect‐Induced Superconductivity in Nb/Sb 2 Te 3 ‐Nanoribbon/Nb Junctions // Annalen der Physik. 2020. Vol. 532. No. 8. p. 2000273.
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Zhang J., Jalil A. R., Tse P. L., Kölzer J., Rosenbach D., Valencia H., Luysberg M., Mikulics M., Panaitov G., Grützmacher D., Hu Z., Lu J. G., Schäpers T. Proximity‐Effect‐Induced Superconductivity in Nb/Sb 2 Te 3 ‐Nanoribbon/Nb Junctions // Annalen der Physik. 2020. Vol. 532. No. 8. p. 2000273.
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TY - JOUR
DO - 10.1002/andp.202000273
UR - https://doi.org/10.1002/andp.202000273
TI - Proximity‐Effect‐Induced Superconductivity in Nb/Sb 2 Te 3 ‐Nanoribbon/Nb Junctions
T2 - Annalen der Physik
AU - Jalil, Abdur Rehman
AU - Kölzer, Jonas
AU - Rosenbach, Daniel
AU - Valencia, Helen
AU - Mikulics, Martin
AU - Schäpers, Thomas
AU - Zhang, Jinzhong
AU - Tse, Pok Lam
AU - Luysberg, Martina
AU - Panaitov, G
AU - Grützmacher, Detlev
AU - Hu, Z.
AU - Lu, J G
PY - 2020
DA - 2020/07/09
PB - Wiley
SP - 2000273
IS - 8
VL - 532
SN - 0003-3804
SN - 1521-3889
ER -
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@article{2020_Zhang,
author = {Abdur Rehman Jalil and Jonas Kölzer and Daniel Rosenbach and Helen Valencia and Martin Mikulics and Thomas Schäpers and Jinzhong Zhang and Pok Lam Tse and Martina Luysberg and G Panaitov and Detlev Grützmacher and Z. Hu and J G Lu},
title = {Proximity‐Effect‐Induced Superconductivity in Nb/Sb 2 Te 3 ‐Nanoribbon/Nb Junctions},
journal = {Annalen der Physik},
year = {2020},
volume = {532},
publisher = {Wiley},
month = {jul},
url = {https://doi.org/10.1002/andp.202000273},
number = {8},
pages = {2000273},
doi = {10.1002/andp.202000273}
}
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Zhang, Jinzhong, et al. “Proximity‐Effect‐Induced Superconductivity in Nb/Sb 2 Te 3 ‐Nanoribbon/Nb Junctions.” Annalen der Physik, vol. 532, no. 8, Jul. 2020, p. 2000273. https://doi.org/10.1002/andp.202000273.