Nano Letters, volume 23, issue 14, pages 6713-6719
Limitations of the Current–Phase Relation Measurements by an Asymmetric dc-SQUID
Publication type: Journal Article
Publication date: 2023-07-10
Journal:
Nano Letters
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 10.8
ISSN: 15306984, 15306992
General Chemistry
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Bioengineering
Abstract
Exotic quantum transport phenomena established in Josephson junctions (JJs) are reflected by a nonsinusoidal current–phase relation (CPR). The solidified approach to measuring the CPR is via an asymmetric dc-SQUID with a reference JJ that has a high critical current. We probed this method by measuring CPRs of hybrid JJs based on the 3D topological insulator (TI) Bi2Te2Se with a nanobridge acting as a reference JJ. We captured both highly skewed and sinusoidal critical current oscillations within single devices which contradict the uniqueness of the CPR. This implies that the widely used method provides inaccurate CPR measurement and leads to misinterpretation. It was shown that the accuracy of the CPR measurement is mediated by the asymmetry in derivatives of the CPRs but not in critical currents, as was previously thought. Finally, we provided considerations for an accurate CPR measurement via the most commonly used reference JJs.
Citations by journals
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1
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Physical Review B
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Physical Review B
1 publication, 50%
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SciPost Physics
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SciPost Physics, 1, 50%
SciPost Physics
1 publication, 50%
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American Physical Society (APS)
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American Physical Society (APS)
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Stichting SciPost
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Stichting SciPost, 1, 50%
Stichting SciPost
1 publication, 50%
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1
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Babich I. et al. Limitations of the Current–Phase Relation Measurements by an Asymmetric dc-SQUID // Nano Letters. 2023. Vol. 23. No. 14. pp. 6713-6719.
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Babich I., Kudriashov A., Baranov D., Stolyarov V. S. Limitations of the Current–Phase Relation Measurements by an Asymmetric dc-SQUID // Nano Letters. 2023. Vol. 23. No. 14. pp. 6713-6719.
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TY - JOUR
DO - 10.1021/acs.nanolett.3c01970
UR - https://doi.org/10.1021%2Facs.nanolett.3c01970
TI - Limitations of the Current–Phase Relation Measurements by an Asymmetric dc-SQUID
T2 - Nano Letters
AU - Babich, Ian
AU - Kudriashov, Andrei
AU - Baranov, Denis
AU - Stolyarov, V. S.
PY - 2023
DA - 2023/07/10 00:00:00
PB - American Chemical Society (ACS)
SP - 6713-6719
IS - 14
VL - 23
SN - 1530-6984
SN - 1530-6992
ER -
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@article{2023_Babich,
author = {Ian Babich and Andrei Kudriashov and Denis Baranov and V. S. Stolyarov},
title = {Limitations of the Current–Phase Relation Measurements by an Asymmetric dc-SQUID},
journal = {Nano Letters},
year = {2023},
volume = {23},
publisher = {American Chemical Society (ACS)},
month = {jul},
url = {https://doi.org/10.1021%2Facs.nanolett.3c01970},
number = {14},
pages = {6713--6719},
doi = {10.1021/acs.nanolett.3c01970}
}
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MLA
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Babich, Ian, et al. “Limitations of the Current–Phase Relation Measurements by an Asymmetric dc-SQUID.” Nano Letters, vol. 23, no. 14, Jul. 2023, pp. 6713-6719. https://doi.org/10.1021%2Facs.nanolett.3c01970.