Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ

“Известия Российской академии наук. Серия физическая” (Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, ISSN 0367-6765; English translation: “Bulletin of the Russian Academy of Sciences: Physics”, ISSN 1062-8738) is a Russian peer-reviewed scientific journal established in 1936 as the Bulletin of the Academy of Sciences of USSR: Physics Series. It presents full-text articles with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. The journal focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied.

For more than 80 years, the main purpose of the journal is to provide authors with the opportunity to publish and discuss the results of relevant fundamental and applied scientific research, presented at conferences, symposiums and scientific schools, organized by the Russian Academy of Sciences, which are recognized by the world scientific community and interdisciplinary experts. The journal accepts for publishing full-text articles, which are prepared on the base of best talks, recommended by program committees of the scientific events, which are of interest to a wide range of readers. Articles containing new and previously unpublished results are peer-reviewed by at least two independent reviewers and are published in special thematic issues of the journal. The journal is open for publishing of the most authoritative and advanced research results in the field of fundamental and applied physics, obtained in Russia and neighboring countries, as well as from authors from all over the world.

The journal is published by the Russian Academy of Sciences under the conduction of the Physical Sciences Division of RAS. The originator is the Editorial Board of the journal “Bulletin of the Russian Academy of Sciences: Physics”.
Until 2018, the journal was published by “Nauka” Publishing House.
Preparation of the original layout and publication of the journal is currently carried out under the state contract by LLC “Thematic Editorial”.

Certificate of registration of mass media ПИ No. ФС 77 – 82377 dated December 10, 2021, issued by the Ministry of press and information of the Russian Federation.

The journal is included in the List of journals recognized by the Higher Attestation Commission of the Ministry of Science and Higher Education of the Russian Federation and included into the Russian scientific citation system RSCI. The translated version of the journal – Bulletin of the Russian Academy of Sciences: Physics – is indexed in Scopus and is included in the Russian Science Citation Index database on the Web of Science platform.

English version of the journal – Bulletin of the Russian Academy of Sciences. Physics is published by Allerton Press Inc. (Pleiades Publishing) and distributed by Springer Nature Switzerland AG.

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Vol 89, No 2 (2025)

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New Materials and Technologies for Security Systems

Electromagnetic field amplification in a resonator in the sub terahertz frequency range
Gusikhin P.A., Kukushkin I.V., Muravev V.M.
Abstract
We presented a numerical simulation of planar resonators for the subterahertz frequency range, confined by various types of reflectors: Bragg mirrors, grating mirrors, solid metal mirrors. The dependences of the amplification of the electric field strength in the resonator on the structure parameters were constructed for normal incidence of an electromagnetic wave on the surface of the resonator. The physical limitations imposed on the magnitude of the gain are determined.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):168–173
pages 168–173 views
Two-dimensional plasma excitations in a split-ring resonator
Kazakov A.S., Gusikhin P.A., Andreev I.V., Muravev V.M., Kukushkin I.V.
Abstract
We analyzed the electromagnetic properties of a split-ring resonator based on a two-dimensional electronic system (2DES). Analysis of the absorption of electromagnetic radiation by the 2DES in the geometry of a split-ring resonator revealed new plasma modes associated with a split in the structure. This plasmon resonance manifests itself under conditions of excitation by both alternating electric and alternating magnetic fields, which opens the possibility of developing a highly efficient tunable phase shifting element.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):174–179
pages 174–179 views
Low frequency properties of a silicon-based plasmonic detector
Shchepetilnikov A.V., Khisameeva A.R., Fedotova Y.V., Dremin A.A., Kukushkin I.V.
Abstract
The properties of a silicon-based plasmonic detector of electromagnetic radiation were examined in the lowfrequency region (0.1-20 GHz). The detector’s sensitive element was embedded within a matched coplanar waveguide, through which the electromagnetic radiation was conveyed. The dependence of the DC voltage observed at the detector’s output on the frequency of the incident radiation was measured. The detector’s power characteristics were measured, and the threshold radiation power at which the detector transitions into a nonlinear regime was determined.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):180–183
pages 180–183 views
The response time of a silicon-based plasmonic detector
Shchepetilnikov A.V., Khisameeva A.R., Fedotova Y.V., Dremin A.A., Kukushkin I.V.
Abstract
The response time of a silicon-based plasmonic detector of electromagnetic radiation was investigated. For this purpose, frequency mixing experiments were carried out in the microwave frequency range. The sensitive element of the detector was embedded in the slits of a matched coplanar waveguide. The response time τ = 60±10 ps was estimated from the attenuation of the signal amplitude with increasing the difference frequency.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):184–187
pages 184–187 views
Phase diagram of magnetoexciton condensate
Berezhnoy P.S., Koreev A.S., Gorbunov A.V., Solovyev V.V., Van’kov A.B., Kulik L.V., Timofeev V.B.
Abstract
The phase boundary of the “gas – magnetoexciton condensate” transition of an excited two-dimensional electron system placed in a quantizing magnetic field is constructed in the “temperature – excitation density” coordinates. Based on experimental data, it can be concluded that the condensate is a collective, incompressible in real space, excited state of a Hall dielectric.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):188–194
pages 188–194 views
Revealing plasmaron dynamics at filling factors from 1 to 2
Berezhnoy P.S., Koreev A.S.
Abstract
We investigated the photoluminescence spectrum of two-dimensional electron systems in the filling factor range from 1 to 2 at a temperature of 40 mK. Plasmaron peaks have been identified and their restructuring observed at filling factor 4/3. At high pumping power, additional peaks, dubbed “double plasmarons” were detected, indicating complex interactions within the system.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):195–199
pages 195–199 views
Magnetic phase transitions and collective effects in MgZnO/ZnO heterostructures
Koreev A.S., Berezhnoy P.S., Van’kov A.B.
Abstract
We presented the results of a study of two-dimensional electron systems implemented in MgZnO/ZnO heterostructures with high interaction parameters. Using the inelastic light scattering method, we observed ferromagnetic transitions and spin textures. We also studied the dispersion dependences of key energy parameters.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):200–203
pages 200–203 views
Study of temporal dynamics of photo-reflection signal at the fractional filling factor ν = 1/3 in the second time range
Larionov A.V., Kulik L.V.
Abstract
The temporal dynamics of the photo-reflection signal was studied at a fractional filling factor of twodimensional electrons ν = 1/3 in a GaAs quantum well at liquid helium temperatures T ≈ 0.6 K. It has been demonstrated that using a modified photon-counting technique it is possible to measure relaxation times of excitations in a Laughlin liquid of the order of 100 seconds.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):204–206
pages 204–206 views
Resonance photoluminescence of the excited Laughlin liquid
Kulik L.V.
Abstract
The resonance photoluminescence of excited Laughlin liquid at the electron filling factor of 1/3 is studied. It is shown that for a neutral defect in Laughlin liquid consisting of an electron at the upper spin sublevel of the zero Landau level and a valence hole, the influence of random potential fluctuations on the probability of optical recombination of the defect is suppressed (random potential superscreening). Filling the Laughlin liquid with single-spin excitations (spin-magnetogravitons) does not affect this observation.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):207–210
pages 207–210 views
Luminescence of MoSe2: effect of temperature and pumping value
Bisti V.E., Brichkin A.S., Golyshkov G.M., Chernenko A.V.
Abstract
The luminescence of excitons and trions in a MoSe monolayer encapsulated with hBN was studied under non-resonant photoexcitation of electron-hole pairs depending on the temperature and pumping intensity. The shift of luminescence lines and the redistribution of intensities can be explained by the influence of both the Fermi gas of free electrons and localized states of electrons caused by the presence of impurities in boron nitride hBN.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):211–214
pages 211–214 views
Excited states of excitons in monolayers of transition metal dichalcogenides in reflectance spectra up to room temperature
Brichkin A.S., Golyshkov G.M., Chernenko A.V., Bisti V.E.
Abstract
The ground and excited states of A- and B-excitons in monolayers of MoSe2 and WSe2 were studied by optical reflectance spectroscopy in a wide range of temperatures up to room temperature. It has been shown that excited states are observed in the spectrum even at room temperature. Depending on the selected parameters of the heterostructure, the B-exciton line may be comparable in intensity to the A-exciton line.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):215–219
pages 215–219 views
Reflectance spectra of two-dimensional excitons in heterostructures with MoSe2 and WSe2 monolayers
Golyshkov G.M., Brichkin A.S., Bisti V.E., Chernenko A.V.
Abstract
A method of reflection and transmission spectroscopy of heterostructures with MoSe2 and WSe2 monolayers were developed and mastered. The obtained spectra were compared with microphotoluminescence spectra. It was shown that the trion line, which dominates in the microphotoluminescence spectra, is absent in the reflection spectra. The dependence of the reflection spectra on the thickness of the encapsulating layers is also presented.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):220–225
pages 220–225 views
Oscillations of a giant enhancement of inelastic light scattering in periodic plasmonic structures as a function of metallic film thickness
Rudakov T.D., Astrakhantseva A.S., Makarovskaya S.M., Soloviev V.V., Kukushkin I.V.
Abstract
It was discovered that in metallic films with periodic holes (the size of the square hole was half the period) the effect of a giant enhancement of the intensity of inelastic light scattering is observed, and the enhancement coefficient depends significantly on the thickness of the metal (silver). It is shown that when the thickness of the silver film changes in the range from 5 nm to 140 nm, strong oscillations of the enhancement coefficient are observed, and the amplitude of the oscillations can be more than an order of magnitude. The observed oscillations are explained in terms of the resonant excitation of standing plasmon-polariton waves in metal films, which dispersion varies significantly with variation of the metal thickness.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):226–231
pages 226–231 views
Investigation of the possibility of using island SERS-structures on a GaP substrate for surface-enhanced inelastic light scattering in the infrared frequency range
Makarovskaya S.M., Soloviev V.V., Rudakov T.D., Kukushkin I.V.
Abstract
We studied the properties of GaP-based periodic dielectric structures with a silver layer coating which can enhance the signal of surface-enhanced inelastic light scattering (SERS). The dependences of the scattering signal intensity on the period for different structure heights were obtained. A comparison of the scattering signal intensities for SiO2 and GaP SERS-structures for laser excitation wavelengths of 532, 785 and 1064 nm was performed. The ability of GaP-based structures with a thin metal layer to enhance the signal by more than 7 orders of magnitude in the infrared frequency range was found. The dependence of the Raman signal enhancement on the thickness of the deposited layer was studied.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):232–236
pages 232–236 views
Gold nanoparticles as SERS-substrates for MTT assay
Mushenkov V.A., Burov A.M., Kukushkin V.I., Zavyalova E.G.
Abstract
Several variants of gold nanoparticles were proposed for the detection of formazan formed because of enzymatic reduction of the MTT reagent by E. coli enzymes. It is shown that gold nanostars coated with a micellar stabilizer are the most promising SERS-substrate for the detection of formazan in biological mixtures, reducing the required titer of bacteria by at least an order of magnitude.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):237–246
pages 237–246 views
Study of the capabilities of Raman spectroscopy in identifying the content of total hemoglobin in human blood
Subekin A.Y., Pylaev T.E., Kukushkin V.I., Rudakova E.V., Rudakov T.D.
Abstract
The possibility of using Raman spectroscopy in determining the total hemoglobin content in the blood was investigated. It has been established that a few lines in the Raman spectrum linearly depend on the hemoglobin concentration. It has been shown that SERS using silver colloids also gives a linear concentration dependence on the intensity of spectral lines
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):247–255
pages 247–255 views
Development of SERS active track-etched membranes with high sustainability in biological fluids
Tikhonova D.S., Andreev E.V., Alieva R.S., Dubkov S.V., Kolmogorov V.S., Erofeev A.S., Nechaev A.N., Kukushkin V.I., Zavyalova E.G.
Abstract
Different approaches for creating an enhancing surface based on a track-etched polyethylene terephthalate membrane are studied. The stability of the covering and the potential for the usage of the obtained substrates were evaluated on the example of the aptasensor for the determination of the influenza A virus.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):256–264
pages 256–264 views
Dynamics of spinor exciton-polariton condensates in double potential traps in a GaAs/AlAs microcavity under resonant picosecond excitation
Demenev A.A., Tereshko S.N., Gippius N.A., Kulakovskii V.D.
Abstract
The temporal evolution of the polarized emission spectra of spinor exciton-polariton condensates in double tunnel-coupled potential traps in a high-Q GaAs/AlAs microcavity at 2 K under resonant laser pumping with picosecond pulses has been studied in the time range up to 1.5 ns. An estimate of the spin relaxation time of the condensate τS ∼ 10 ns is obtained. The influence of the symmetry of the trap potential on the energy spectrum of the polariton modes and on the polarization dynamics of the spinor condensate in the tunnel-coupled potential traps is discussed.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):265–273
pages 265–273 views
Self-oscillatory and chaotic states of a polariton system in a size-quantized cavity micropillar
Ipatov N.N., Gavrilov S.S.
Abstract
Theoretical study is performed of a quasi-two-dimensional exciton-polariton system localized in a circular microcavity mesa under the conditions of resonant photoexcitation. It is predicted that in a case when several size-quantized sublevels are excited, a series of transitions occurs from stationary to self-oscillatory and further to chaotic states. The transition from stationary states to oscillations is accompanied by a lowering of the rotational symmetry down to a discrete one, whereas in the chaotic region the spatial symmetry disappears completely. In a spinor system, analogous phenomena result in polarization chaos.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):274–279
pages 274–279 views
Experimental studies of the generation thresholds of circularly polarized еmission from injection semiconductor lasers
Maksimov A.A., Tartakovskii I.I.
Abstract
The dependences of the radiation intensity in various circular polarizations from injection surface-emitting lasers with a vertical chiral microresonator on the excitation current value were experimentally investigated. A sharp increase of the circular polarization degree of the laser emission from small values of ≈ 5 % to the values of <70% was observed at a current exceeding the threshold value. Considering the nonlinear optical properties of laser resonators model calculations were performed, the calculation results are in good agreement with the experiment.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):280–285
pages 280–285 views
Studies of spin-phonon interaction in magnetic topological insulators MnBi2Te4 by Raman spectroscopy
Maksimov A.A., Tartakovskii I.I., Abdullaev N.A., Mamedov N.T.
Abstract
Experimental studies of Raman scattering spectra in single crystals of topological magnetic insulators MnBi2Te4 have been performed in a wide temperature range. The influence of spin-phonon interaction on the studied spectra at temperatures below the antiferromagnetic phase transition temperature is discussed.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):286–289
pages 286–289 views
Raman scattering in ferromagnetic Ge1−xCox nanowires
Zaitsev S.V., Dmitriev A.I.
Abstract
Correlation of the temperature dependencies of Raman scattering and ferromagnetic resonance is found in nanowires of a dilute magnetic semiconductor Ge0.99Co0.01. A sudden softening of the optical phonons lines occurs at T ≈ 74 K. The observed behavior indicates a strong interaction of carriers not only with phonons, but also with the magnetic system.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):294–298
pages 294–298 views
Raman scattering in ferromagnetic Ge1−xMnx nanowires
Zaitsev S.V.
Abstract
The temperature dependence of Raman scattering is investigated in nanowires of a dilute magnetic semiconductor Ge0.99Mn0.01. It was found that with increasing temperature, a red shift (“softening”) of the optical LO-phonon line occurs at T ≈ 25 K. The observed behaviour correlates with the data of the electron paramagnetic resonance of mobile charge carriers and indicates a strong interaction of holes with the phonon and magnetic subsystems.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):290–293
pages 290–293 views
Surface enhanced Raman scattering on grids with submicron silver coating
Zaitsev S.V.
Abstract
A new method for obtaining effective grid substrates with a nanostructured silver coating by electrodeposition from an electrolyte solution for the study of Raman-active molecules by surface-enhanced Raman scattering (SERS) without a chemically passive separation layer is proposed. The amplification effect is two orders of magnitude higher than the amplification in the so-called “hot spots” of metal substrates before silver coating.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):299–304
pages 299–304 views

Wave Phenomena: Physics and Applications

Waves and fine structures of physical variables in a viscous stratified liquid
Ochirov A.A., Trifonova U.O.
Abstract
The surface perturbation in a viscous, stratified liquid is investigated in a two-dimensional setting. Expressions for the dynamics of periodic surface motion and the fine-scale structure of currents are derived. Distributions of the wave and ligament components of the density, density gradients, and pressure are constructed. A fine structure accompanying the wave component of the flow is identified in physically measurable variables.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):306–313
pages 306–313 views
Current structure in the Black Bay of the Kandalaksha Bay during different phases of the tidal cycle
Ivanova I.N., Budnikov A.A., Vasin А.I., Levonyan K.A.
Abstract
We presented the results of in-situ measurements of currents in the Black Bay of Kandalaksha Bay in 2021–2023, which is subject to tidal influence. The surface and bottom currents in different phases of the tidal cycle were measured using a grid of stations, the area in which the current from Nilmo-guba is registered was determined, and the in-situ measurements were compared with the results of modeling of bottom currents.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):314–319
pages 314–319 views
Using the geometric properties of three invariants in the wave equation for the electric field strength
Ovsyannikov V.M.
Abstract
In Euler’s work Principia motus fluidorum, the continuity equation for a fluid is derived using high-order terms of smallness that contain the quadratic and cubic invariants of the strain rate tensor. From Maxwell’s system of electrodynamics equations, the wave equation for the electric field strength is derived taking into account the quadratic and cubic invariants. These invariants describe the generation of electric field intensity waves.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):320–327
pages 320–327 views
Spatial variation of superconducting order parameters in thin aluminum films
Bezymyannykh D.G., Pugach N.G., Sedov E.A., Arutyunov K.Y.
Abstract
Oscillations of the order parameter arising because of spatial quantization of electronic states in a quantum well formed by the walls of a thin film of superconducting aluminum were theoretically studied. In such objects, with decreasing thickness, a noticeable increase of critical temperature and broadening of superconducting transition are observed. These effects are interpreted as the manifestation of quantum size effect that affects the density of states of electrons and, hence, other various electronic properties of thin films.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(2):328–332
pages 328–332 views

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