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Measurement of the Thermal Conductivity of Carbon Nanowalls by the 3ω Method
JETP Letters. 2023. No. 117. P. 449–455.
Chernodubov D. A., Bondareva J., Shibalov M. V., Mumlyakov A. M., Zhdanov V., Tarkhov M. A., Maslakov K. I., Suetin N. V., Kvashnin D. G., Evlashin S.
Carbon nanowall films with different thicknesses have been obtained by chemical deposition from a gas phase in a dc discharge. The thermal conductivity of the resulting structures has been measured for the first time using the 3ω method in the temperature range of 280–310 K. It has been shown that the thermal conductivity of walls depends on their thickness. The thermal conductivity of 1-μm carbon nanowalls is 6.9 W m–1 K–1. The results obtained in this work are necessary to design electro-optical devices based on carbon nanowalls.
Vergeles S. S., Vointsev I., Physics of Fluids 2026 Vol. 38 P. 024117-1–024117-8
We analytically consider the problem of the Langmuir instability. The instability describes emergence of transverse modulation of horizontal current with vertical shear, when it is superimposed on surface wave co-directional with the flow. Compared to the Craik–Leibovich scheme, we account for the scattering of surface wave on the modulated current, which is significant if the ...
Added: September 26, 2026
Frolov N. Y., Klokov A. Y., Sharkov A. I. et al., Applied Physics Letters 2026 Vol. 128 P. 092201-1–092201-5
Understanding the properties of two-dimensional material interfaces with the substrate is necessary for device applications. Surface acoustic wave propagation through a layered material flake on a substrate could provide unique information on the transverse rigidity of the flake-to-substrate interaction. Ultrasonic waves were generated by a focused femtosecond laser pulse at the surface of a model ...
Added: September 26, 2026
Войтович В. И., Makhov I., Мельниченко И. А. et al., Optics Letters 2026 Vol. 51 No. 17 P. 4872–4875
The influence of cavity surface passivation with SiO2 coating deposited by the plasma-enhanced chemical vapor deposition technique is investigated for injection microdisk lasers with an InGaAsN/GaAs quantum well active region. The electroluminescence spectra of the microdisk lasers with cavity diameters ranging from 12 to 32 μm with and without sidewall surface passivation were studied for a ...
Added: September 25, 2026
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Оптика и спектроскопия 2026 Т. 134 № 3 С. 272–277
Представлены результаты по реализации генерации при повышенных температурах в лазерах с длиной волны генерации 980 nm на основе вертикального микрорезонатора с использованием непоглощающих на длине волны оптической накачки зеркал. Минимальная пороговая мощность накачки составила ~0.8 mW и соответствовала температуре 150 K. Добротность микрорезонатора, определенная на пороге генерации, превысила 13000. Максимальная рабочая температура микролазера составила 195 ...
Added: September 25, 2026
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Письма в Журнал технической физики 2026 Т. 52 № 12 С. 40–43
Реализована одночастотная генерация при 300 K в лазерах на основе вертикального микрорезонатора. Для лазеров с полупроводниковым выводным зеркалом пороговая плотность мощности накачки составила 6.5 kW/cm2. Добротность микрорезонатора и длина волны излучения, определенные на пороге генерации, равнялись 8800 и ~ 959.8 nm. Применение конструкции микрорезонатора с гибридным выводным зеркалом позволило повысить добротность микрорезонатора (до 12 360) ...
Added: September 25, 2026
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Письма в Журнал технической физики 2026 Т. 52 № 18 С. 30–34
Представлены результаты реализации генерации при комнатной температуре в планарных вертикальных микрорезонаторах на основе зеркал Al0.2Ga0.8As/Al0.9Ga0.1As. При 300 K пороговая плотность мощности и добротность на пороге генерации составили 11.4± 0.7 kW/cm2 и 5070± 160 соответственно. Двукратное превышение порога генерации привело к увеличению добротности микрорезонатора до 19 000. Эффективный латеральный теплоотвод подтвержден малым сдвигом энергии кванта, который составил ...
Added: September 25, 2026
Budkov Y., Kiselev M. G., Journal of Chemical Physics 2026 Vol. 165 No. 12 Article 124508
We develop a three-mode statistical-mechanical theory for a two-conformer
solute in a near-critical solvent. A compressible lattice model with
vacancies yields the Gaussian free-energy functional for a critical conserved
density, an orthogonal noncritical conserved mode, and the local conformer
fraction. Their couplings follow from packing and cohesive interactions,
rather than being introduced phenomenologically. Kawasaki transport of the
two conserved fields and ...
Added: September 24, 2026
Kryzhanovskaya N., Makhov I., Dragunova A., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2026 Vol. 19 No. 1.1 P. 98–104
The planar microcavity structure was grown using molecular-beam epitaxy.
Single-mode lasing was observed at a wavelength of 960 nm for pillars with a diameter of
15 μm. At 300 K, the lasing threshold was approximately 30 mW. Increasing the pump
power to 2.7 times the threshold power resulted in a mode energy shift of approximately
1 meV. This shift ...
Added: September 23, 2026
Andreeva S., Gavrilov A. A., Dzhikirba K. R. et al., Physical Review B: Condensed Matter and Materials Physics 2026 Vol. 114 Article 134515
We examine plasma excitations with linear dispersion in a system of superconducting electrons in thin
NbN disks. Using frequency-domain terahertz spectroscopy, we study the evolution of plasmons up to critical
temperature Tc. The observed excitations tend to shift to the lower frequencies while temperature is increasing
and the spectral features vanish at T > Tc. We study the ...
Added: September 23, 2026
Образцова А. А., Ivanov K., Moiseev E. et al., Journal of Physics D: Applied Physics 2026 Vol. 59 No. 30 P. 305103
We demonstrate a thermo-optically tunable microlaser based on an InGaAs/GaAs quantum-dot (QD) active region employing a deformed limaçon-shaped cavity. The asymmetric geometry effectively lifts the degeneracy of high-Q whispering-gallery modes, enabling single-mode lasing. A side-mode suppression ratio exceeds 25 dB over a wide current range. Under continuous-wave electrical pumping, the device achieves a peak output power ...
Added: September 23, 2026
Budkov Y., Journal of Chemical Physics 2026 Vol. 165 No. 12 Article 124105
Exact theories of electrolyte structure must satisfy the nonlocal constraints imposed by electrostatic screening, yet these constraints are most commonly formulated only for homogeneous bulk systems and at the level of two-point correlations. Here, we develop a unified field-theoretic framework that extends them to general inhomogeneous ionic fluids and nonlinear charge correlations. Using a standard ...
Added: September 22, 2026
Боровицкая И. В., Пименов В. Н., Коршунов С. Н. et al., Перспективные материалы 2026 № 10 С. 37–54
Проведено сравнение, обобщение и систематизация механизмов эрозии и разрушения
поверхности малоактивируемых материалов, перспективных для использования в
качестве материалов вакуумной камеры термоядерных реакторов: ванадия, его сплава
V – 10 Ti – 6 Cr – 0,05 Zr – 0,1 Si и вольфрама при последовательном воздействии на
них ионных и тепловых потоков. Тепловые потоки имитировали с помощью мощного
импульсного лазерного излучения (ЛИ), создаваемого ...
Added: September 22, 2026
Iontsev M.A., Mukhin S. I., Fistul M. V., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 94 No. 17 P. 174–510
We report a theoretical study of the ac response of superconducting quantum metamaterials (SQMs), i.e., an array of qubits (two-level systems) embedded in a low-dissipative resonator. By making use of a particular example of a SQM, namely the array of charge qubits capacitively coupled to the resonator, we obtain a second-order phase transition between an ...
Added: September 22, 2026
Shilov A. L., Elesin L., Kravtsov M. et al., Nature Communications 2026 Vol. 17 No. 1 Article 9734
Identifying the microscopic processes limiting conductivity is essential for understanding correlated quantum materials. In twisted bilayer graphene, metallic resistivity follows ρ ~ Tα with widely varying α, fueling competing interpretations from phonon-limited transport and umklapp scattering to strange metallicity and heavy-fermion renormalization. Here, we use terahertz excitation to selectively heat electrons while keeping the lattice cold, separating ...
Added: September 20, 2026
Alekseev D., Logunov M., Lazarev M. et al., Computational Materials Science 2025 Vol. 248 Article 113572
Two-dimensional C60 carbon allotropes have gained much attention since their first synthesis in 2022, but many of their thermophysical and mechanical properties remain unreported in the literature. In this article, we performed a high-temperature molecular dynamics study of quasi-hexagonal (qHP) and quasi-tetragonal (qTP) C60 phases using the modern machine-learning interatomic potential GAP-20. We show that, ...
Added: February 18, 2026
Azarevich A. N., Khrykina O. N., Bolotina N. B. et al., Solid State Sciences 2025 Vol. 167 Article 107990
The presented studies of resistivity (ρ), thermal conductivity (κ) and specific heat (C) at low temperature 1.8−7 K in magnetic field up to 90 kOe made it possible to detect for the first time the exponential field dependences ρ(H), κ −1(H), C(H) ∼ exp(−μeffH/kBT) of the charge transport and thermal characteristics in the so-called antiferroquadrupole (AFQ) ...
Added: February 18, 2026
Shvidenko A., Ciais P., Patra P. et al., Global Biogeochemical Cycles 2025 Vol. 39 No. 10 Article e2025GB008540
A system reanalysis of the current greenhouse gases budget of terrestrial ecosystems in russia / A. Shvidenko, P. Ciais, P. K. Patra et al. // Global Biogeochemical Cycles. — 2025. — Vol. 39, no. 10. — P. e2025GB008540. This study synthesizes the budgets of three greenhouse gases (GHG, namely CO2, CH4, N2O) forRussia over two decades (2000–2009 and 2010–2019) using bottom‐up and top‐down approaches, as part ...
Added: October 28, 2025
Ananyeva N. D., Ivashchenko K. V., Urabova S. A. et al., Почвоведение 2024 Т. 57 № 12 С. 2208–2221
Ecosystem services are a modern tool of environmental assessment, planning, and design, especially in large cities. The top layer (0–10 cm) of soddy-podzolic soils (Albic Retisols) was sampled in urban forest parks of Moscow (Aleshkino, Bitsa, Lesnaya experimental dacha, Troparevo, Lianozovo, and Yugo-Zapadny) and suburban (background) forests. In total, 30 samples (6 × 5 plots) ...
Added: February 19, 2025
Lashkari A. H., Ostovari Moghaddam A., Shokuhfar A., Applied Physics A: Materials Science and Processing 2023 Vol. 129 Article 373
Nickel-doped off-stoichiometric bornite Cu5–xNixFeS3.71 0 ≤ x ≤ 1 nanoparticles were synthesized by high-energy mechanical alloying (MA) and subsequent annealing at 653 K for 1 h. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) of the annealed powders revealed low-orthorhombic bornite as the main phase with a minor amount (< 2%) of digenite as the second phase. XRD analysis, scanning electron microscopy ...
Added: February 18, 2025
Петрова Е. Б., Chulkova G., Физика в школе 2024 № 1 С. 46–51
The article describes laboratory work to determine the thermal conductivity of metals. To create an experimental setup, the authors used simple and affordable equipment. The possibilities of using the proposed experiment both for laboratory practice and for student project work are considered. ...
Added: December 5, 2024
Konyashin I., Ruslan Muydinov, Cammarata A. et al., Communications Materials 2024 Vol. 5 No. 1 Article 115
Carbon is considered to exist in three basic forms: diamond, graphite/graphene/fullerenes, and carbyne, which differ in a type of atomic orbitals hybridization. Since several decades the existence of the fourth basic carbon allotropic form with the face-centered cubic (fcc) crystal lattice has been a matter of discussion despite clear evidence for its laboratory synthesis and ...
Added: September 19, 2024
Evlashin S., Fedorov F. S., Chernodoubov D. A. et al., Journal of Electroanalytical Chemistry 2024 Vol. 956 Article 118091
Carbon materials are of outstanding interest for use in energy sources. One of the latest achievements in improving their specific characteristics is the doping of carbon materials with various heteroatoms. However, the mechanisms that lead to improved performance remain unexplored. In this study, we investigated the influence of structural defects and incorporated heteroatoms on the ...
Added: February 9, 2024
Makarova V. V., Gorbacheva S. N., Kostyuk A. V. et al., Journal of Energy Storage 2022 Vol. 47 Article 103595
The work is devoted to evaluation of the thermal conductivity of composites based on asphaltenes and paraffin as a phase change material. Asphaltenes with different structural characteristics, obtained by chemical modification and fractionation were used to improve the heat conductivity of paraffin. Modification of asphaltenes with sulfuric acid and oleum made it possible to obtain ...
Added: January 29, 2023
Макарова В. В., Горбачева С. Н., Антонов С.В. et al., Журнал прикладной химии 2020 Т. 93 № 12 С. 1696–1715
Theoretical and experimental data on the eff ect of additions of micro- and nanosized solid particles on the thermal conductivity of liquid media (nanofl uids) are considered. According to theoretical calculations, a manifold increase in the thermal conductivity is possible only for resting media in which percolation structures are formed from the modifi er nanoparticles, ...
Added: January 29, 2023