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 Articles containing new and previously unpublished results are peer-reviewed by at least two independent reviewers and are published in special thematic issues of the journal.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 87, No 6 (2023)

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Structure, physico-mechanical properties and piezoresponse of scaffolds based on polyhydroxybutyrate with composite magnetite/reduced graphene oxide filler
Shlapakova L.E., Pryadko A.S., Mukhortova Y.R., Wagner D.V., Surmeneva M.A., Surmenev R.A.

The influence of fiber diameter and addition of composite filler magnetite/reduced graphene oxide on the properties of electrospun scaffolds of poly(3-hydroxybutyrate) has been studied. The magnetic composite filler provides good magnetic properties and piezoresponse of the scaffolds, while changing the fiber diameter allows controlling the ductility, crystallinity, and surface electric potential.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):766-772
pages 766-772 views
Influence of the supramolecular and crystal structure of polylactide on the realization of the shape memory effect
Zimina A.I., Kovaleva P.A., Kiselev D.A., Krupatin I.N., Senatov F.S.

The influence of different methods of polylactide processing on its structural parameters were studied. The thermal properties and crystallinity of the material and the relationship between these properties and its supramolecular structure were studied, as well as the impact of these parameters on the realization of the shape memory effect of polylactide.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):773-779
pages 773-779 views
Patterns of effect of spark plasma sintering temperature on microstructure of thermoelectric composites based on BiTeSeBimatrix with cobalt inclusions
Zhezhu M., Vasil’ev A.E., Ivanov O.N.

Effect of spark plasma sintering temperature on the formation of Co filler particles in the Bi2Te2.1Se0.9 matrix has been examined. Owing to high-temperature diffusion redistribution of atoms in the matrix and filler materials and chemical interaction between these materials, in the Bi2Te2.1Se0.9 + 0.33 wt % Co, core–shell filler particles (Co@CoTe2) are formed. With increasing the sintering temperature, fraction of the “CoTe2 shell” in the particles increases, while fraction of the “Co core” decreases. This behavior is due to an increasing in the diffusion coefficient of Co in the Bi2Te2.1Se0.9 matrix with increasing in the sintering temperature. The concentration profiles of the Co distribution of in the Bi2Te2.1Se0.9 matrix, governed by diffusion, are well described using Fick’s second law for diffusion from a limited source of a diffusing substance. The diffusion coefficient of Co increases with increasing un the sintering temperature in accordance with the Arrhenius law and with an activation energy of ~0.61 eV.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):780-785
pages 780-785 views
Effect of microstructure on the thermo-power of thermoelectric composite of the BiTe (matrix) + Ni (filler) system
Zhezhu M., Vasil’ev A., Ivanov O.N.

The patterns of effect of the ferromagnetic filler content on the features in the microstructure of “Ni core–shell NiTe2” inclusions, changes in the Seebeck coefficient and electron concentration in samples of the Bi2Te3 (matrix) + xNi (filler) composites with x = 0.00; 0.50; 0.85; 1.25 and 1.50 wt % have been found. It is shown that the Seebeck coefficient in the composites x = 0.50 and 0.85 exceeds the calculated values, which may be due to additional scattering of electrons by the magnetic moments of inclusion atoms.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):786-791
pages 786-791 views
Spin wave selection in an ensemble of laterally and vertically coupled iron-yttrium garnet microwaveguides
Khutieva A.B., Akimova V.R., Beginin E.N., Sadovnikov A.V.

Numerical micromagnetic modeling used to study the modes of propagation of spin waves and processes of power transfer in the considered arrays of microwaves in the configuration corresponding to excitation in two central channels of one of the layers of surface and inverse bulk magnetostatic spin waves is conducted. It is shown that the proposed structure performs the functions of spatial-frequency signal selection, the efficiency of which depends on the mutual orientation of the submagnetization field and the direction of wave propagation.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):792-795
pages 792-795 views
Mangiferin-loaded nanofibers based on hyaluronic acid
Klimshina V.I., Snetkov P.P., Morozkina S.N., Uspenskaya M.V.

The physical characteristics of water-organic spinning solutions based on hyaluronic acid with the addition of mangiferin were investigated. From these solutions by electrospinning, fibers were obtained and morphologically characterized, which can be recommended as regenerative coatings, as well as mangiferin delivery systems with transdermal transfer.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):796-800
pages 796-800 views
Obtaining and research of the properties of magnetic-luminescent hybrid structures based on iron oxide (FeO) with semiconductor shells
Kafeeva D.A., Kurshanov D.A., Dubavik A.Y.

The high-temperature organic synthesis of hydrophobic superparamagnetic nanocomposites of the Fe3O4/ZnS and Fe3O4/ZnSe core–shell type is discussed. An analysis of the absorption, luminescence, magnetic circular dichroism (MCD) and morphology spectra of hydrophobic magnetoluminescent nanocomposites is presented. It is shown that nanocomposites have luminescent properties, and the growth of the shell on the Fe3O4 core retains the magnetic properties of the particles. An analysis of the MCD spectra shows that the magnetic field induces spin-dependent chiral magneto-optical activity. An estimate of the dependence of the g factor on the magnitude and sign of the external magnetic field demonstrates a change in the magnetization of the resulting nanocomposites relative to Fe3O4.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):801-806
pages 801-806 views
Fabrication of GRIN microstructures by two-photon lithography
Aparin M.D., Baluyan T.G., Sharipova M.I., Sirotin M.A., Lyubin E.V., Soboleva I.V., Bessonov V.O., Fedyanin A.A.

The method of two-photon lithography is used to fabricate GRIN microstructures. Test rectangular structures with sizes 25 × 25 × 3 micrometers were used with varying laser intensity by linear or gaussian distribution in one dimension. The resulting refractive index has been tuned in the range of 0.03. The suggested method can be applied to produce arbitrarily shaped 3D GRIN micro-optical elements.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):807-812
pages 807-812 views
Magnetic-controlled composite elastomer based on polydimethylsiloxane with a porous structure
Amirov A.A., Kaminsky A.S., Arkhipova E.A., Cherkasova N.A., Tovpinets A.O., Leucine V.N., Pyatakov A.P., Zhivulin V.E., Rodionova V.V.

Magnetic elastomers based on polydimethylsiloxane polymer with a filler of barium hexaferrite microparticles with a homogeneous and porous microstructure have been obtained. The microstructure, magnetic and mechanical properties of the obtained samples were studied. The filler leaching method used in the work makes it possible to obtain magnetic elastomers with a porosity of about 58%. It is shown that the porous microstructure leads to a significant decrease in the Young’s modulus of the samples from 0.63 MPa (homogeneous) to 27 kPa (porous) and doesn’t produce any significant changes in the magnetic properties of the sample.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):813-818
pages 813-818 views
Magnetic nanoparticles FeO modified with sodium dodecyl sulphate for removing methylene blue from water
Magomedov K.E., Omelyanchik A.S., Vorontsov S.A., Čižmár E., Rodionova V.V., Levada E.V.

We show that surface-modified magnetic iron oxide nanoparticles with an average size of about 10 nm have a high adsorption capacity for sorption of pollutants from wastewater. A significant advantage of using magnetic materials is the ability to extract the sorbent using an external magnetic field, which makes the purification process more efficient. We found that the anionic substance sodium dodecyl sulfate increases the electrostatic attraction to the cationic compound methylene blue, and also prevents the aggregation of nanoparticles, thus increasing the active surface. The sorption capacity of magnetic nanoparticles after surface functionalization increased by a factor of 250 compared to unmodified iron oxide nanoparticles. The mechanism and kinetic parameters of the sorption process were determined, as well as the optimal conditions for increasing the efficiency of the sorption process.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):819-827
pages 819-827 views
Fermi level pinning on the (110) oxidized surface of AIII-Sb semiconductors
Alekseev P.A., Smirnov A.N., Sharov V.A., Borodin B.R., Kunitsyna E.V.

Pinning of the Fermi level on the oxidized (110) surface of AIII-Sb semiconductors (GaSb, Ga0.78In0.22As0.18Sb0.82, Ga0.66Al0.34As0.025Sb0.975) was studied. It is shown that the Fermi level is pinned at 4.65 ± 0.1 eV from the vacuum level. The presence of Sb was shown for the photooxidized Ga0.78In0.22As0.18Sb0.82 and Ga0.66Al0.34As0.025Sb0.975 surfaces. The formation of Sb on the surface because of faster oxidation of group III elements results in pinning of the Fermi level at the same distance from the vacuum level in III-Sb compounds.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):829-832
pages 829-832 views
Investigation of the characteristics of supercapacitor electrodes based on doped silicon-carbon films
Bogush I.Y., Plugotarenko N.K.

Silicon-carbon films undoped and doped with manganese and nickel have been investigated by cyclic voltammetry, galvanostatic charge/discharge and impedance spectroscopy. The charge storage process in silicon-carbon films is determined to be predominantly capacitive in nature. The best specific capacitance retention is observed for electrode samples containing nickel.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):833-837
pages 833-837 views
Room temperature ferromagnetism of a crystalline semiconductor compound HgFeSe at extremely low concentration of impurity iron atoms ( ≤ 0.06 at %)
Govorkova T.E., Okulov V.I., Pamyatnykh E.A., Gaviko V.S., Surikov V.T.

On the single crystals of Hg1 – xFexSe (х ≤ 0.06 at %) with an extremely low concentration of the impurity iron atoms at room temperature (T = 300 K), high-temperature ferromagnetism of a new type in a impurity donor electron system was experimentally discovered.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):838-842
pages 838-842 views
Interface electronic states contribution into terahertz photoconductivity in structures based on HgCdTe with inverted energy spectrum
Kazakov A.S., Galeeva A.V., Artamkin A.I., Ikonnikov A.V., Chmyr S.N., Dvoretskiy S.A., Mikhailov N.N., Bannikov M.I., Danilov S.N., Ryabova L.I., Khokhlov D.R.

We show the differences in the necessarily formed electronic states at the boundaries of the topological phase with a vacuum and with a trivial buffer in the regions of heterojunction in topological materials based on epitaxial films Hg1 – xCdxTe. It was demonstrated that the PT-symmetric terahertz photoconductivity observed in these structures is due precisely to the states in the region of the topological film/trivial buffer (or cap-layer) interfaces.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):843-848
pages 843-848 views
On a shape of band-to-acceptor luminescence line in semiconductors
Kokurin I.A., Averkiev N.S.

A theoretical explanation is proposed for the shape of the long-wavelength edge of the luminescence line, which is caused by the recombination of a free electron and a hole of a neutral acceptor. The formation of complexes, in which a single hole is localized by the field of two attracting ions ( complexes) and the subsequent recombination of holes in such complexes with electrons of the conduction band are considered. The Coulomb repulsion in the final state after recombination and the dispersion of the complexes in terms of the interionic distance provide an extended long-wavelength tail of the luminescence line, comparable in magnitude to the ionization energy of a single acceptor.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):849-854
pages 849-854 views
Surface emitting quantum-cascade lasers with a second-order grating and increased coupling coefficient
Babichev A.V., Kolodeznyi E.S., Gladyshev A.G., Kharin N.Y., Petruk A.D., Panevin V.Y., Voznyuk G.V., Mitrofanov M.I., Slipchenko S.O., Lyutetskii A.V., Evtikhiev V.P., Karachinsky L.Y., Novikov I.I., Pikhtin N.A., Egorov A.Y.

The results of studying the characteristics of surface-emitting quantum-cascade ring lasers with a second-order grating are presented. The selection of etching receipt by ion beam lithography made it possible to increase the coupling coefficient to 12 cm–1. Lasing close to 7.6 μm with a low threshold current density (about 0.3 kA/cm2) is demonstrated.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):855-860
pages 855-860 views
The energy position of size quantization levels in multiple HgCdTe quantum wells
Mikhailov N.N., Remesnik V.G., Aleshkin V.Y., Dvoretsky S.A., Uzhakov I.N., Shvets V.A.

The energy position of size quantization levels size levels in the multiple Hg0.3Cd0.7Te/HgTe quantum wells grown by molecular beam epitaxy on (013)GaAs substrate has been studied. The experimental and calculated values of the energy position of three size quantization levels are obtained.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):861-866
pages 861-866 views
Thermal stability of ferroelectric films based on hafnium-zirconium dioxide on silicon
Popov V.P., Antonov V.A., Tikhonenko F.V., Myakonkikh A.V., Rudenko K.

The results are presented indicating an increase in thermal stability, as well as structural and electrophysical properties of obtained by plasma-stimulated atomic layer deposition (PEALD) 20 nm ferroelectric HfO2, Hf0.5Zr0.5O2 films with the inserts of Al2O3 monolayers and without them, in metal-ferroelectric-silicon mesa structures, promising for universal memory devices.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):867-872
pages 867-872 views
Self-sustaining conducting state and bipolar ionizing Gunn domains in pulse avalanche GaAs diodes
Rozhkov А.V., Ivanov M.S., Rodin P.B.

Domain instability in nonequilibrium electron-hole plasma leads to the formation of narrow moving regions of the ionizing electric field—collapsing Gunn domains. In pulse power electronics devices based on gallium arsenide, impact ionization in collapsing domains acts as an efficient mechanism for the generation of nonequilibrium carriers at low voltages and weak average electric fields.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):873-878
pages 873-878 views
Quantum-dimensional near-surface recombination of photocarriers in CdTe microcrystals
Selkin A.V., Yuldashev N.K.

The low-temperature (T = 2 K) photoluminescence spectra of a p-CdTe/n-CdS film heterostructure containing CdTe microcrystals have been studied. In the spectral region above the intrinsic absorption edge of bulk CdTe, a dominant “superhot” radiation band was found. The band arises because of optical transitions of electrons from near-surface levels of the spatial quantization of a microcrystal to the valence band states.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):879-884
pages 879-884 views
Investigation of the biexciton radiative cascade in a single InAs/GaAs quantum dot embedded in a high-Q microcavity
Serov Y.M., Galimov A.I., Toropov A.A.

A biexciton radiative cascade was recorded in the photoluminescence spectra of an InAs/GaAs QD embedded in a λ-cavity with a relatively high-quality factor of 4600, formed in a micropillar with GaAs/AlGaAs distributed Bragg reflectors. The spectrum and kinetics of the radiation, measured under conditions of two-photon excitation, demonstrated a significant effect of the microcavity on the emission process. A possible improvement based on this effect in the generation of entangled photon pairs is discussed.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):885-891
pages 885-891 views
GaN/AlGaN resonant Bragg structure
Ivanov A.A., Chaldyshev V.V., Zavarin E.E., Sakharov A.V., Lundin W.V., Tsatsulnikov A.F.

Reflection spectra from a resonant Bragg structure with 30 GaN/AlGaN quantum wells have been measured at room temperature. Numerical modeling using the method of transfer matrices gave a quantitatively accurate fit of the experimental results. Defined radiative and non-radiative broadening parameters of the exciton in GaN/AlGaN quantum wells.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):892-895
pages 892-895 views
Polaron effects created by interface phonons in thin film on ionic substrates
Maslov A.Y., Proshina O.V.

The effective parameter of the electron-phonon interaction in a semiconductor film on ionic substrates has been determined. It is shown that interface phonons “transfer” the polarization of the medium from the substrate to the film. As a result, the polaron binding energy and the effective mass of carriers in the same film on different substrates can vary by tens or even hundreds of percent. Conditions for the realization of strong interaction for various films are found.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):896-900
pages 896-900 views
Time-dependent photoconductivity in iron doped ZnSe crystals
Storozhevykh M.S., Kalinushkin V.P., Uvarov O.V., Chegnov V.P., Chegnova O.I., Yuryev V.A.

We investigated photoconductivity in ZnSe crystals doped with iron by thermal diffusion in wavelength range 470–5000 nm at the temperature of 77 and 300 K. The samples show high photoconductivity in the visible region. The effects of long-term growth and relaxation of the photocurrent were discovered as well as the dependence of time of the photocurrent growth and relaxation on the wavelength of exciting radiation, its power and the voltage applied to a sample. The effect of quenching of residual photoconductivity under the irradiation in the range 850–940 nm was observed.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):901-906
pages 901-906 views
Terahertz radiation sources based on AlGaAs/GaAs superlattices
Dashkov A.S., Gerchikov L.G., Goray L.I., Kharin N.Y., Sobolev M.S., Khabibullin R.A., Bouravleuv A.D.

We proposed several types of design of terahertz emitters based on the perfect AlGaAs/GaAs superlattices obtained by molecular-beam epitaxy. Transition energies, gain, and losses are calculated for the developed structures, which determined the design of the created experimental structures.

Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2023;87(6):907-912
pages 907-912 views

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