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Second-Harmonic Current-Phase Relation in Josephson Junctions with Ferromagnetic Barriers
Physical Review Letters. 2018. Vol. 121. No. 177702. P. 177702-1–177702-5.
Stoutimore M. J., Rossolenko A. N., Bolginov V. V., Oboznov V. A., Rusanov A. Y., Baranov D. S., Pugach N., Frolov S. M., Ryazanov V., Van Harlingen D. J.
We report the observation of a current-phase relation dominated by the second Josephson harmonic in superconductor-ferromagnet-superconductor junctions. The exotic current-phase relation is realized in the vicinity of a temperature-controlled 0-to-π junction transition, at which the first Josephson harmonic vanishes. Direct current-phase relation measurements, as well as Josephson interferometry, non-vanishing supercurrent and half-integer Shapiro steps at the 0-π transition self-consistently point to an intrinsic second harmonic term, making it possible to rule out common alternative origins of half-periodic behavior. While surprising for diffusive multimode junctions, the large second harmonic is in agreement with theory predictions for thin ferromagnetic interlayers.
Publication based on the results of:
Dmitriev A., Kornilov V., Batienkov R., Lecture Notes in Civil Engineering 2026 Vol. 886 P. 249–255
Numerous studies have provided compelling evidence that the probability distribution of avalanche sizes follows a power law, and that 1/f noise is present in the stochastic dynamics of landslides. We present a theoretical explanation of these phenomena within the framework of self-organized criticality theory, proposing a discrete-time model in the form of a sandpile cellular ...
Added: October 13, 2026
Dmitriev A., Shulman I., Lebedev A., Studies in Computational Intelligence 2026 Vol. 1265 P. 266–273
A discrete-time model is presented for the self-organization of the X/Twitter social network to the edge of a phase transition, characterized by avalanche-like propagation of information in the network. The model is based on the analogy between the critical dynamics of the X social network and sandpile cellular automata with Manna rule on the Chung-Lu ...
Added: October 13, 2026
Arutyunov K., Kharitonov I. A., Petrosyants K. O., JETP Letters 2026 Vol. 124 No. 6 P. 1–16
Superconducting properties of metallic micro- and nanowires can be entirely different from those of bulk superconductors. Of particular interest is the nonequilibrium current-induced state of a quasi-one-dimensional superconducting channel. The most interesting phenomenon here is the stepped I–V characteristic, explained by a process known as phase slip center activation. If the origin of such step-like ...
Added: October 13, 2026
Makarov D. M., Kalikin N., Fashchevsky K. A. et al., Electrochimica Acta 2026 Vol. 579 Article 150159
Machine learning (ML) has become a powerful tool for accelerating the development of carbon-based supercapacitors;
however, most published models assume that a single predictive framework can describe both conventional
porous carbons and hybrid carbon electrodes. Here, we test this assumption using a comprehensive
benchmark dataset and an extended literature-curated dataset enriched with synthesis- and electrolyte-related
descriptors. Three ML algorithms ...
Added: October 13, 2026
Махлуф М., Ozhegov R., Elezov M. et al., Фотоника 2026 Vol. 20 No. 6 P. 414–423
This paper compares the ranging precision of direct time-of-flight (dToF) and non-line-of-sight (NLOS) LiDAR architectures, both using a superconducting nanowire single-photon detector (SNSPD). Both systems operate at 1550 nm with a 50 ps pulsed laser and time-correlated single-photon counting (TCSPC). The dToF configuration achieved approximately 100 µm precision at 10 m, while the NLOS configuration achieved 500 µm precision for ...
Added: October 12, 2026
Singapore: Springer, 2026.
This volume presents the Proceedings of the 34th IUPAP Conference on Computational Physics (CCP2023), held in Kobe, Japan on August 4–8, 2023. It offers a collection of peer-reviewed articles that highlight recent developments in computational and simulation research across various areas of physics. Key topics include the use of data science, quantum computing, and machine ...
Added: October 12, 2026
Goncharov A., Chibisov A., Advanced Theory and Simulations 2023 Vol. 12 No. 13 Article 2200816
Designing stable quantum computers with the ability to correct errors responsibly requires a detailed understanding of the physical processes that underlie these devices. In this study, detailed quantum mechanical simulations of the atomic structure, charge distribution of electron density, and distribution and orientation of magnetic and quantum states as a function of applied external pressure ...
Added: October 11, 2026
Chibisov A., Gnidenko A., Chibisova M. et al., FlatChem 2023 Vol. 41 Article 100533
Manufacturing precise quantum computers with small errors in quantum operations, long coherence times, and low power consumption is the most important challenge in modern nanoelectronics. To understand the operating modes of such calculators in detail, both the optimal arrangement of the qubit system within the structure and changes in its magnetic properties must be comprehensively ...
Added: October 11, 2026
Селезнёв Д. В., Yagovtsev V., Pugach N. et al., Физика металлов и металловедение 2023 Т. 124 № 2 С. 196–203
The magnetization induced in a superconductor due to the reverse proximity effect is studied in hybrid structures containing a superconductor and a ferromagnetic insulator. The study was carried out within the method of semiclassical Green’s functions, in which the Usadel equations are solved numerically with boundary conditions suitable for strongly spin-polarized ferromagnetic materials. The conversion ...
Added: November 17, 2022
Turkin Y. V., Pugach N., Екомасов Е. Г. et al., Физика металлов и металловедение 2023 Т. 124 № 1 С. 42–48
This paper presents a theoretical study of the dynamics of the induced magnetization and spin current
arising in a layer of an dirty superconductor due to the proximity to a ferromagnetic dielectric with a
uniform periodically precessing magnetization. The dynamics of the observed physical quantities is described
within the semi-classical Usadel–Floquet formalism, which makes it possible to study ...
Added: November 17, 2022
Yagovtsev V., Gusev N., Pugach N. et al., Superconductor Science and Technology 2021 Vol. 34 Article 025003
The magnetization in a superconductor induced due to the inverse proximity effect is
investigated in hybrid bilayers containing a superconductor and a ferromagnetic
insulator or a strongly spin-polarized ferromagnetic metal. The study is performed
within a quasiclassical Green function framework, wherein Usadel equations are solved
with boundary conditions appropriate for strongly spin-polarized ferromagnetic
materials. A comparison with recent experimental data ...
Added: December 7, 2020
Karabassov T., Stolyarov V. S., Golubov A. A. et al., Physical Review B: Condensed Matter and Materials Physics 2019 Vol. 100 No. 10 P. 104502-1–104502-9
We investigate the behavior of the critical temperature T_c in superconductor/ferromagnet/superconductor (S/F/S) trilayers in the dirty limit as a function of the ferromagnetic layer thickness d_f and the S/F interface transparency. We perform T_c calculations using the general self-consistent multimode approach based on the Usadel equations in Matsubara Green’s functions technique, and compare the results ...
Added: September 5, 2019
Stoutimore M. J., Rossolenko A. N., Bolginov V. et al., / Series "cond-mat". 2018. No. 1805.12546.
We report the observation of a current-phase relation dominated by the second Josephson harmonic in superconductor-ferromagnet-superconductor junctions. The exotic current-phase relation is realized in the vicinity of a temperature-controlled 0-to-π junction transition, at which the first Josephson harmonic vanishes. Direct current-phase relation measurements, as well as Josephson interferometry, non-vanishing supercurrent and half-integer Shapiro steps at ...
Added: October 30, 2018
Bakurskiy S. V., Klenov N. V., Soloviev I. I. et al., / Series cond-mat "arxiv.org". 2018. No. 1808.07090.
We study the peculiarities in current-phase relations (CPR) of the SIsFS junction in the region of 0 to p
transition. These CPR consist of two independent branches corresponding to 0− and p− states of the contact.
We have found that depending on the transparency of the SIs tunnel barrier the decrease of the s-layer thickness
leads to transformation ...
Added: October 28, 2018
Bakurskiy S. V., Klenov N. V., Soloviev I. I. et al., Applied Physics Letters 2018 Vol. 113 No. 082602 P. 082602-1–082602-5
We study the peculiarities in current-phase relations (CPR) of the SIsFS junction in the region of 0
to p transition. These CPR consist of two independent branches corresponding to 0- and p-states of
the contact. We have found that depending on the transparency of the SIs tunnel barrier, the decrease
in the s-layer thickness leads to transformation of ...
Added: October 28, 2018
Pugach N., Safonchik M., Champel T. et al., / Series cond-mat "arxiv.org". 2017. No. 1702.08828.
We propose a superconducting spin-triplet valve of a new type. This spin valve consists of a bilayer
that involves a superconductor and an itinerant magnetic material, with the magnet showing an
intrinsic non-collinear magnetic order characterized by a wave vector Q that may be aligned in a
few equivalent preferred directions under control of a weak external magnetic ...
Added: September 30, 2017
Pugach N., Safonchik M., , in: MIPT Conference & International School “Superconducting hybrid nanostructures: physics and application” September 19-26, 2016.: Dolgoprudni: [б.и.], 2016. P. 45–45.
Added: February 26, 2017
Pugach N., Safonchik M., , in: "Micro- and Nanoelectronics – 2016" Proceedings of the International Conference.: M.: Max press, 2016. P. 62–62.
Added: February 26, 2017
Pugach N., Буздин А. И., Хаим Д., В кн.: НАНОФИЗИКА И НАНОЭЛЕКТРОНИКА Труды XVII Международного симпозиумаТ. 1.: Н. Новгород: Издательство Нижегородского государственного университета им. Н.И. Лобачевского, 2013. С. 61–62.
Сверхпроводимость и магнетизм в однородной системе способствуют двум противоположным видам спинового упорядочения валентных электронов. Однако, в структурах где ферромагнетик (F) соседствует со сверхпроводником (S), взаимовлияние этих двух типов упорядочения приводит к целому ряду интересных эффектов, один из которых обратный эффект близости. Он заключается в том, что вблизи SF границы равновесное спиновое распределение электронов проводимости изменяется ...
Added: February 26, 2017
Pugach N., Сафончик М. О., В кн.: "Нанофизика и наноэлектроника" Труды XXI Международного симпозиума.: Н. Новгород: Издательство Нижегородского государственного университета им. Н.И. Лобачевского, 2017. С. 94–95.
Предлагается теоретическое исследование сверхпроводящих спиновых вентилей нового типа на основе магнитных материалов с неколлинеарным магнитным упорядочением. Использование таких материалов должно существенно упростить структуру спиновых вентилей до двух слоев: сверхпроводника и неколлинеарного магнетика с контролируемым магнитным упорядочением, а следовательно, может упростить и технологию их изготовления. А также, решить проблему выборочного магнитного переключения в матрице из таких ...
Added: February 26, 2017