TY - JOUR
T1 - Revealing Josephson Vortex Dynamics in Proximity Junctions below Critical Current
AU - Stolyarov, Vasily S.
AU - Ruzhitskiy, Vsevolod
AU - Hovhannisyan, Razmik A.
AU - Grebenchuk, Sergey
AU - Shishkin, Andrey G.
AU - Skryabina, Olga V.
AU - Golovchanskiy, Igor A.
AU - Golubov, Alexander A.
AU - Klenov, Nikolay V.
AU - Soloviev, Igor I.
AU - Kupriyanov, Mikhail Yu
AU - Andriyash, Alexander
AU - Roditchev, Dimitri
N1 - Funding Information:
The authors thank D. Baranov for the technical assistance and N. Bergeal for fruitful discussions. MFM experiments were carried out with the support of the Russian Science Foundation (Project No. 18-72-10118). Numerical modeling were carried out with the support of the Russian Science Foundation (Project No. 20-69-47013). Nb film reactive ion etching was supported by the Federal Academic Leadership Program Priority 2030 (NUST MISIS Grant No. K2-2022-029). e-beam lithography was done at MIPT Shared Facilities Center and was supported by the Ministry of Science and Higher Education of the Russian Federation (No. FSMG-2021-0005).
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/7/27
Y1 - 2022/7/27
N2 - Made of a thin non-superconducting metal (N) sandwiched by two superconductors (S), SNS Josephson junctions enable novel quantum functionalities by mixing up the intrinsic electronic properties of N with the superconducting correlations induced from S by proximity. Electronic properties of these devices are governed by Andreev quasiparticles (Andreev, A. Sov. Phys. JETP 1965, 20, 1490) which are absent in conventional SIS junctions whose insulating barrier (I) between the two S electrodes owns no electronic states. Here we focus on the Josephson vortex (JV) motion inside Nb-Cu-Nb proximity junctions subject to electric currents and magnetic fields. The results of local (magnetic force microscopy) and global (transport) experiments provided simultaneously are compared with our numerical model, revealing the existence of several distinct dynamic regimes of the JV motion. One of them, identified as a fast hysteretic entry/escape below the critical value of Josephson current, is analyzed and suggested for low-dissipative logic and memory elements.
AB - Made of a thin non-superconducting metal (N) sandwiched by two superconductors (S), SNS Josephson junctions enable novel quantum functionalities by mixing up the intrinsic electronic properties of N with the superconducting correlations induced from S by proximity. Electronic properties of these devices are governed by Andreev quasiparticles (Andreev, A. Sov. Phys. JETP 1965, 20, 1490) which are absent in conventional SIS junctions whose insulating barrier (I) between the two S electrodes owns no electronic states. Here we focus on the Josephson vortex (JV) motion inside Nb-Cu-Nb proximity junctions subject to electric currents and magnetic fields. The results of local (magnetic force microscopy) and global (transport) experiments provided simultaneously are compared with our numerical model, revealing the existence of several distinct dynamic regimes of the JV motion. One of them, identified as a fast hysteretic entry/escape below the critical value of Josephson current, is analyzed and suggested for low-dissipative logic and memory elements.
KW - cryo-electronics
KW - Josephson junctions
KW - Josephson vortices
KW - magnetic force microscope
KW - superconductivity
KW - 22/3 OA procedure
UR - http://www.scopus.com/inward/record.url?scp=85135198061&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.2c00647
DO - 10.1021/acs.nanolett.2c00647
M3 - Article
C2 - 35820103
AN - SCOPUS:85135198061
VL - 22
SP - 5715
EP - 5722
JO - Nano letters
JF - Nano letters
SN - 1530-6984
IS - 14
ER -