?
Fate of the superconducting state in floating islands of hybrid nanowire devices
Physical Review B: Condensed Matter and Materials Physics. 2024. Vol. 109. No. 14. Article L140501.
E. V. Shpagina, Tikhonov E., Ruhstorfer D., Koblmueller G. K., Khrapai V.
We investigate the impact of transport current on the superconducting order parameter in superconducting islands in full-shell epitaxial Al-InAs nanowires. Depending on the device layout, the suppression of superconductivity occurs in three fundamentally different ways-by a critical current in the case of superconducting reservoirs and by a critical voltage or by a critical Joule power in the case of normal reservoirs. In the latter case, the collapse of the superconducting state depends on the ratio of the dwell time and the electron-phonon relaxation time of quasiparticles in the island. For low resistive and high resistive coupling to the reservoirs, respectively, a relaxation-free regime and a strong electron-phonon relaxation regime are realized. Our results shed light on the potential shortcomings of finite-bias transport spectroscopy in floating islands.
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
Khrapai V., Tikhonov E., Nature Physics 2026 P. 1198–1199
Feng et al.1 presented transport measurements of three-terminal normal–superconductor–normal devices based on topological insulator nanowires. They measured the full differential conductance matrix, defined as Gij = ∂Ii /∂Vj , beyond the linear response regime as a function of various control parameters. Here i, j∈ [1, 2] denote normal terminals biased by the voltages V1 and ...
Added: August 5, 2026
Kirillov S. Y., Klinshov V., Chaos 2025 Vol. 35 No. 9 Article 093117
The Kuramoto model, a paradigmatic framework for studying synchronization, exhibits a transition to collective oscillations only above a critical coupling strength in the thermodynamic limit. However, real-world systems are finite, and their dynamics can deviate significantly from mean-field predictions. Here, we investigate finite-size effects in the Kuramoto model below the critical coupling, where the theory ...
Added: December 22, 2025
Latyshev A., Semenov A. G., Zaikin A., Письма в Журнал экспериментальной и теоретической физики 2025 Т. 122 № 11-12 С. 843–847
We demonstrate that the system of two connected in series resistively shunted Josephson nanojunctions
may exhibit a novel quantum Coulomb drag effect mediated by cotunneling of Cooper pairs. In the Coulomb
blockade regime, one of the junctions can develop a non-vanishing electric current while an external voltage bias
is applied to another one. This phenomenon results from a ...
Added: December 11, 2025
Sharov V., Pavlov A., Eliseyev I. et al., Advanced Optical Materials 2025 Vol. 13 No. 30 Article e01821
Strain engineering is a powerful tool for the development of nanostructured semiconductor devices. In this work, the effect of high external elastic strain is investigated on the photoluminescence of GaN nanowires (NWs). Individual horizontal NWs are strained to bending strains up to 2.2% using an atomic force microscope (AFM) probe. Novel nanomanipulation techniques for mechanical ...
Added: November 12, 2025
E. V. Shpagina, E. S. Tikhonov, Ruhstorfer D. et al., Physical Review B: Condensed Matter and Materials Physics 2025 Vol. 112 No. 14 Article L140503
We investigate a nonequilibrium aspect of the current-driven superconducting-normal phase transition in floating Al islands of epitaxial full-shell Al/InAs nanowires. Within a transition region discontinuous voltage jumps and hysteretic behavior of the I-V characteristics are observed, associated with the destruction and recovery of the superconducting order parameter in the island. The strength of the two ...
Added: November 9, 2025
Dubrovskii V., Cirlin G., Kirilenko D. et al., Nanoscale Horizons 2024 Vol. 9 No. 12 P. 2360–2367
Increasing the InN content in the InxGa1xN compound is paramount for optoelectronic applications. It has been demonstrated in homogeneous nanowires or deliberately grown nanowire heterostructures. Here, we present spontaneous core–shell InxGa1xN nanowires grown by molecular beam epitaxy on Si substrates at 625 C. These heterostructures have a high InN fraction in the cores around 0.4 ...
Added: November 23, 2024
Gridchin V. O., Dragunova A., Kotlyar K. P. et al., Journal of Physics: Conference Series 2021 Vol. 2086 Article 012013
The influence of the growth time on the structural properties of InGaN nanowires grown on Si substrate by plasma-assisted molecular beam epitaxy are studied. Under appropriate other growth conditions, the growth for 2h leads to the formation of separated nanowires, whereas the growth for 2h 30min and 3h leads to the formation of nanostructures such ...
Added: May 31, 2024
Golubev D., Zaikin A., Beilstein Journal of Nanotechnology 2023 Vol. 14 P. 61–67
Electrons in two different normal metallic electrodes attached to a sufficiently thin superconducting island may become entangled due to the effect of Cooper pair splitting. This phenomenon is of fundamental importance and may also have serious implications for developing quantum communication technologies. One way to identify Cooper pair splitting is to analyze long-range cross correlations ...
Added: April 17, 2024
Жуков А. А., И. E. Батов, Журнал экспериментальной и теоретической физики 2024 Т. 165 № 3 С. 424–437
We report on the low temperature measurements of the magnetotransport in Si-doped InAs quantum wire in the presence of a charged tip of an atomic force microscope serving as a mobile gate, i.e. scanning gate microscopy (SGM). By altering the carrier concentration with back gate voltage, we transfer the wire through several transport regimes: from ...
Added: April 14, 2024
Shugabaev T., Gridchin V. O., Sergey D. Komarov et al., Nanomaterials 2023 Vol. 13 No. 6 Article 1069
Hybrid nanostructures based on InGaN nanowires with decorated plasmonic silver nanoparticles are investigated in the present study. It is shown that plasmonic nanoparticles induce the redistribution of room temperature photoluminescence between short-wavelength and long-wavelength peaks of InGaN nanowires. It is defined that short-wavelength maxima decreased by 20%, whereas the long-wavelength maxima increased by 19%. We ...
Added: July 3, 2023
Reznik R. R., Gridchin V. O., Kotlyar K. P. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2023 Vol. 16 No. 1.1 P. 153–157
AlGaAs nanowires with InAs quantum dots on the silicon surface were synthesized by molecular-beam epitaxy. Morphological and optical properties of grown nanostructures were studied. It is important to note, that emission from quantum dots is observed in the wavelength range from 780 to 970 nm. Assumptions about the nature of short-wave radiation from quantum dots ...
Added: July 3, 2023
S. D. Komarov, Gridchin V. O., Lendyashova V. V. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2023 Vol. 16 No. 1.2 P. 114–120
In this work, the photoluminescence of single InGaN NWs with a core-shell structure is investigated along their entire length at RT and 77 K. Multicolor emission, covering the spectral range from 380 to 650 nm, was obtained and described in details. Using the modified Vegard’s law, the photoluminescence lines were correlated with the InGaN composition. ...
Added: July 3, 2023
Kudryashova Y., Gavrilin I., Tatiana L. Kulova et al., Mendeleev Communications 2023 Vol. 33 No. 3 P. 318–319
A new electrochemical system for sodium-ion batteries, sodium iron-manganese phosphate–germanium nanowires,
has been developed and tested. The laboratory batteries possessed an average discharge voltage of ~2.0 V and an
energy density based on the weight of active materials to 210 Wh kg–1. ...
Added: April 13, 2023
Bubis A. V., E. V. Shpagina, Nasibulin A. G. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 104 No. 12 Article 125409
We investigate diffusive nanowire-based structures with two normal terminals on the sides and a central
superconducting island in the middle, which is either grounded or floating. Using a semiclassical calculation
we demonstrate that both device layouts permit a quantitative measurement of the energy dependent subgap
thermal conductance Gth from the spectral density of the current noise. In the ...
Added: April 3, 2023
Denisov A., Bubis A., Piatrusha S. et al., Nanomaterials 2022 Vol. 12 No. 9 Article 1461
Mesoscopic superconductivity deals with various quasiparticle excitation modes, only one of them—the charge-mode—being directly accessible for conductance measurements due to the imbalance in populations of quasi-electron and quasihole excitation branches. Other modes carrying heat or even spin, valley etc. currents populate the branches equally and are charge-neutral, which makes them much harder to control. This ...
Added: April 3, 2023
Karabassov T., Emir Amirov, Bobkova I. V. et al., Condensed Matter 2023 Vol. 8 No. 2 Article 36
Currently, the superconducting diode effect (SDE) is being actively discussed, due to its large application potential in superconducting electronics. In particular, superconducting hybrid structures, based on three-dimensional (3D) topological insulators, are among the best candidates, due to their having the strongest spin–orbit coupling (SOC). Most theoretical studies on the SDE focus either on a full ...
Added: March 20, 2023