Gate-tunable Josephson diode effect in Rashba spin-orbit coupled quantum dot junctions
Publication type: Journal Article
Publication date: 2024-05-06
scimago Q1
wos Q2
SJR: 1.303
CiteScore: 6.2
Impact factor: 3.7
ISSN: 24699950, 24699969, 10980121, 1550235X
Abstract
We theoretically explore the Josephson diode effect (JDE) in superconductor/quantum dot (QD)/superconductor junction in the presence of a magnetic field and Rashba spin-orbit interaction (RSOI). We calculate the Josephson current in our QD junction using the Keldysh nonequilibrium Green's function technique. We show that JDE is induced in our chiral QD junction with a large rectification coefficient (RC) in the presence of RSOI and external magnetic field simultaneously. Interestingly, the sign and magnitude of the RC are highly controllable by the magnetic field and RSOI. For realistic RSOI strength in the presence of magnetic field and chirality, the RC can be tuned to be as high as $70%$ by an external gate potential, indicating a giant JDE in our QD junction. Our proposed QD-based Josephson diode (JD) may serve as a potential superconducting device component.
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Metrics
38
Total citations:
38
Citations from 2024:
38
(100%)
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Debnath D. et al. Gate-tunable Josephson diode effect in Rashba spin-orbit coupled quantum dot junctions // Physical Review B. 2024. Vol. 109. No. 17. 174511
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Debnath D., Dutta P. Gate-tunable Josephson diode effect in Rashba spin-orbit coupled quantum dot junctions // Physical Review B. 2024. Vol. 109. No. 17. 174511
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TY - JOUR
DO - 10.1103/physrevb.109.174511
UR - https://link.aps.org/doi/10.1103/PhysRevB.109.174511
TI - Gate-tunable Josephson diode effect in Rashba spin-orbit coupled quantum dot junctions
T2 - Physical Review B
AU - Debnath, Debika
AU - Dutta, Paramita
PY - 2024
DA - 2024/05/06
PB - American Physical Society (APS)
IS - 17
VL - 109
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
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@article{2024_Debnath,
author = {Debika Debnath and Paramita Dutta},
title = {Gate-tunable Josephson diode effect in Rashba spin-orbit coupled quantum dot junctions},
journal = {Physical Review B},
year = {2024},
volume = {109},
publisher = {American Physical Society (APS)},
month = {may},
url = {https://link.aps.org/doi/10.1103/PhysRevB.109.174511},
number = {17},
pages = {174511},
doi = {10.1103/physrevb.109.174511}
}