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Growth of Three-Dimensional InGaN Nanostructures by Plasma-Assisted Molecular Beam Epitaxy
ACS Applied Nano Materials. 2024. Vol. 7. No. 15. P. 17460–17468.
Gridchin V., Kotlyar K., Ubyivovk E., Lendyashova V., Anna S. Dragunova, Natalia V. Kryzhanovskaya, Dmitrii S. Shevchuk
A study on the formation of InGaN ternary compounds in the three-dimensional growth mode is presented.
For the first time, we demonstrate that the self-organization during InGaN growth is responsible for the formation of core−shell nanowires (NWs), nanotubes, zinc blende (ZB) phases, and nanoflowers. It is found that the core−shell InGaN NWs are formed at the very initial stage of growth. An increase in growth time results in the ascending indium diffusion from the cores of NWs and their accumulation at the NW tips, enabling three- dimensional lateral growth and formation of nanotubes. Further nanostructure growth leads to the formation of nanoflowers with empty stems and ZB/wurtzite (WZ) phase interface at the periphery. The observed structural transformations of NWs are supported by transmission electron microscopy and photoluminescence measurements, as well as theoretical estimates. Understanding the formation mechanisms of these complex three-dimensional nanostructures can facilitate the development of InGaN compounds for gas-sensing applications.
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
Son A. G., Gushina V. A., Teplyakov E. A. et al., Physical Chemistry Chemical Physics 2026 Vol. 28 No. 33 P. 20162–20176
We report tunable structural and optical properties of Cs‑Pb‑Br nanomaterials, including the classic CsPbBr3 perovskite, and perovskite-inspired CsPb2Br5 and Cs4PbBr6 compounds. By systematically varying precursor composition, reaction conditions, and external stimuli, such as moisture and solvents, we achieve controlled formation and reversible phase transitions among these structures. Optical spectroscopy, combined with density functional theory, reveals ...
Added: July 31, 2026
Knyazeva H., МЕТОД: Московский ежегодник трудов из обществоведческих дисциплин 2025 Т. 5 № 3 С. 40–58
This article analyzes the anthropocosmic approach to understanding the evolution of humans and the Universe in light of modern concepts of the anthropic principle and the paradigm of complexity theory. It examines the conceptual foundations of cosmic evolution in the works of Pierre Teilhard de Chardin and V. I. Vernadsky, who offer different interpretations of ...
Added: June 20, 2026
Шугабаев Т., Мельниченко И. А., Кузнецов А. et al., Nanoscale Horizons 2026 P. 1–8
The combination of plasmonic systems and the high optical gain of InGaN is a promising approach for the fabrication of nanolasers and other nanoscale light sources. Here, we demonstrate, for the first time, the use of MBE-grown GaN nanowires with embedded InGaN quantum wells as the key components for plasmonic nanolasers. The utilization of quantum ...
Added: April 9, 2026
Кайдышева Н. Н., Исторический бюллетень (Российская Федерация) 2023 Т. 6 № 3 С. 73–81
The goal of this study is to present the main achievements of modern Ural historiography in the field of the formation and development of civil society in the Urals in the second half of the 19th – early 20th centuries, and to identify prospects for further research. Such leading researchers of the history of civil ...
Added: February 22, 2026
Shandyba N. A., Eremenko M. M., Dukhan D. D. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2025 Vol. 18 No. 3.1 P. 19–22
This work demonstrates, for the first time, the selective formation of ordered arrays of vertical GaAs nanowires on Si(111) with a native oxide layer using a two-step pre-treatment of the substrate surface with a focused Ga-ion beam. Based on our previous studies, we show that modifying the substrate through a two-step protocol — first applying ...
Added: December 11, 2025
LePoire D., Grinin L. E., Korotayev A., Journal of Big History 2025 Vol. 8 No. 3 P. 98–139
Building on foundational work in systems theory, thermodynamics, and evolutionary theory, this paper argues that complexity can serve as a conceptual bridge across disciplines. It explores the role of complexity dynamics in Big History through an integrative theoretical framework that spans physical, chemical, geological, biological, social, cognitive, and civilizational domains. By examining how complexity emerges, ...
Added: November 1, 2025
Jakobson L. I., Журнал Новой экономической ассоциации 2025 № 1(66) С. 224–244
The purpose of the paper is to identify the objective circumstances limiting the effectiveness of self-organization. Self-organization is viewed as a type of relationship among individuals and organizations based on the norms other than those of remuneration which are typical of market institutions or the norms generated by the right to coercion inherent to the ...
Added: September 11, 2025
Ivanova I., Scientometrics 2025 Vol. 130 No. 6 P. 3109–3126
This paper reviews research topics that I have had the fortune to explore with Loet Leydesdorff over the past decade. What initially seemed to be different areas of research have eventually been brought together into a unified framework for a theory of meaning in inter-social communication. The sociology of communication laid the foundations for a ...
Added: September 2, 2025
Sorokin P., Afanaseva I., Журнал Сибирского федерального университета. Серия: Гуманитарные науки 2025 Т. 18 № 5 С. 970–979
The article, based on the theoretical review of scholarly and expert literature in the field of contemporary art, the cultural-historical and formal-stylistic analysis of artworks, as well as on the basis of interviews with contemporary Russian artists, analyses the recent experience of creation of new practices of action and creative youth communities, which in turn ...
Added: May 30, 2025
Babichev A. V., Papylev D. S., S. D. Komarov et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2024 Vol. 17 No. 3.1 P. 233–237
The planar microcavity structure based on non-absorbing Al0.2Ga0.8As/Al0.9Ga0.1As mirrors was fully fabricated by molecular-beam epitaxy. Usage of In0.63Ga0.37As quantum dots reveals room temperature emission near 1110 nm with emission bandwidth of about 80 meV. The determined spectral mismatch between peak position of gain region and reflectivity spectrum dip was about 115 meV at 290 K. ...
Added: May 14, 2025
Solodovnik M., Balakirev S., Ivan S. Makhov et al., Applied Surface Science 2025 Vol. 700 Article 163211
Despite the rapid growth in the number of studies devoted to quantum dot (QD) formation on patterned substrates,
segregation effects that have a significant impact on the properties of QD-based heterostructures remain
largely unexplored. In this paper, we focus on the influence of segregation under different capping regimes on the
optical properties of various InAs/GaAs nanostructures: QDs and ...
Added: April 17, 2025
Balakirev S. V., Makhov I., Kirichenko D. V. et al., Optical Materials 2025 Vol. 163 Article 116964
We reveal a strong dependence of optical properties of InAs quantum dots (QDs) on the As/Ga flux ratio used
during the overgrowth with a low-temperature GaAs layer. Evaluating various characteristics of the photoluminescence
spectra, we determine an optimal As/Ga flux ratio which allows formation of QDs emitting at the
longest wavelengths, with the highest intensity and the largest ...
Added: April 17, 2025
Puzachenko A. Y., Sandlerskiy R., Biology Bulletin 2023 Vol. 50 No. 2 P. S119–S131
We tried to trace the stages of Puzachenko scientific path and highlight the key areas of his scientific interest: the organization and functioning of complex self-organizing nonequilibrium systems (biogeocenosis and landscapes) and different aspects of biodiversity and relationships between species and their environment. ...
Added: February 26, 2025
R. B. Sandlerskiy, Petrzhik N. M., Jargalsaikhan T. et al., Biology Bulletin 2023 Vol. 50 No. S2 P. S226–S238
The results of using a thermodynamic approach to study the functioning of mountain forest biogeocenoses based on Landsat 8 OLI TIRS multispectral scanner survey for the landscapes of the northwestern Khubsugul region are presented. Using the example of a section of the Khordol-Sardag ridge, the spatiotemporal variation of thermodynamic characteristics calculated within the framework of ...
Added: February 26, 2025
Stalinov G., Экономическая социология 2025 Т. 26 № 1 С. 113–142
Couriers, taxi drivers and truckers are atomized workers who move daily in public spaces outside of work collectives. Nevertheless, they are able to maintain community solidarity through self-organizing practices. I compare the practices of interaction and mutual assistance in three groups through the theory of structuration by E. Giddens. The work is based on observations ...
Added: February 10, 2025
Koreyev A. S., P.S. Berezhnoy, Gorbunov A. V. et al., Physical Review B: Condensed Matter and Materials Physics 2024 Vol. 110 No. 16 Article 165417
The phase diagram of the “gas-magnetoexciton condensate” transition of an excited two-dimensional electron
system placed in a quantizing magnetic field has been constructed in the “temperature-laser excitation power
density” coordinates. Based on the experimental data, we can conclude that the condensate is a collective,
incompressible in real space, excited state of a quantum Hall insulator. ...
Added: January 10, 2025