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Bulletin of the Russian Academy of Sciences: Physics最新文献

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Studies of Spin–Phonon Interaction in Magnetic Topological Insulators MnBi2Te4 by Raman Spectroscopy 利用拉曼光谱研究磁性拓扑绝缘体 MnBi2Te4 中的自旋-虹离子相互作用
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-24 DOI: 10.1134/S1062873824709620
A. A. Maksimov, I. I. Tartakovskii, N. A. Abdullaev, N. T. Mamedov
{"title":"Studies of Spin–Phonon Interaction in Magnetic Topological Insulators MnBi2Te4 by Raman Spectroscopy","authors":"A. A. Maksimov,&nbsp;I. I. Tartakovskii,&nbsp;N. A. Abdullaev,&nbsp;N. T. Mamedov","doi":"10.1134/S1062873824709620","DOIUrl":"10.1134/S1062873824709620","url":null,"abstract":"<p>Experimental studies of Raman scattering spectra in single crystals of topological magnetic insulators MnBi<sub>2</sub>Te<sub>4</sub> 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.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 2","pages":"276 - 279"},"PeriodicalIF":0.48,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optical Computation of the Laplace Operator at Normal Incidence Using a Multilayer Metal–Dielectric Structure 基于多层金属-介电结构的正入射拉普拉斯算子的光学计算
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S106287382470905X
A. I. Kashapov, E. A. Bezus, D. A. Bykov, L. L. Doskolovich
{"title":"Optical Computation of the Laplace Operator at Normal Incidence Using a Multilayer Metal–Dielectric Structure","authors":"A. I. Kashapov,&nbsp;E. A. Bezus,&nbsp;D. A. Bykov,&nbsp;L. L. Doskolovich","doi":"10.1134/S106287382470905X","DOIUrl":"10.1134/S106287382470905X","url":null,"abstract":"<p>A theoretical and numerical investigation was made of the optical implementation of the second-order spatial differentiation operation using a layered metal–dielectric structure at normal light beam incidence. Numerical simulation results confirmed the theoretical results and showed the possibility of optical calculation of the Laplace operator at normal incidence with high quality.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"7 - 10"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optical Pulses in a Non-Hermitian Medium near a Singularity 奇异点附近非厄米介质中的光脉冲
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709048
V. A. Bushuev, B. I. Mantsyzov
{"title":"Optical Pulses in a Non-Hermitian Medium near a Singularity","authors":"V. A. Bushuev,&nbsp;B. I. Mantsyzov","doi":"10.1134/S1062873824709048","DOIUrl":"10.1134/S1062873824709048","url":null,"abstract":"<p>The spectral method was used to solve the problem of interaction of short optical pulses with PT‑symmetric photonic crystals under conditions of frequency singularity. It was shown that, at a small deviation from the exceptional point of spontaneous decay of PT-symmetric field modes, frequency singularities of the transmission and reflection coefficients of the structure arise. This leads to a significant narrowing of the pulse spectra and an increase in their amplitude and duration with unidirectional Bragg reflection.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"1 - 6"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Propagation of Fractal Speckles in Optical Systems and in Free Space 分形散斑在光学系统和自由空间中的传播
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709103
R. T. Kubanov, A. M. Zotov, P. V. Korolenko, A. Yu. Mishin
{"title":"Propagation of Fractal Speckles in Optical Systems and in Free Space","authors":"R. T. Kubanov,&nbsp;A. M. Zotov,&nbsp;P. V. Korolenko,&nbsp;A. Yu. Mishin","doi":"10.1134/S1062873824709103","DOIUrl":"10.1134/S1062873824709103","url":null,"abstract":"<p>The diffraction transformation of wave fractal fields is considered. It is shown that, when light beams with a speckle structure propagate in optical systems and in free space, their fractal properties have a high degree of stability.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"32 - 36"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Some Characteristics of Nonlinear Potential Surface Waves in an Ideal Fluid 理想流体中非线性势面波的一些特性
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709255
A. A. Ochirov, K. Yu. Lapshina
{"title":"Some Characteristics of Nonlinear Potential Surface Waves in an Ideal Fluid","authors":"A. A. Ochirov,&nbsp;K. Yu. Lapshina","doi":"10.1134/S1062873824709255","DOIUrl":"10.1134/S1062873824709255","url":null,"abstract":"<p>A potential wave motion along a free surface of a deep ideal fluid has been studied. The exact solutions of the equations of motion with the physically validated boundary conditions on a free surface have been obtained. The shape of the free surface has been studied as a function of the amplitude and the surface characteristics have been highlighted. The characteristics of waves as a function of the nonlinearity parameter have been studied.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"131 - 137"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retraction Note: SERS-Based Rapid Detection of Botulinum Toxin A Using an Aptasensor 撤稿注：基于sers的A型肉毒毒素aptassensor快速检测
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873825010010
O. A. Ambartsumyan, A. M. Brovko
{"title":"Retraction Note: SERS-Based Rapid Detection of Botulinum Toxin A Using an Aptasensor","authors":"O. A. Ambartsumyan,&nbsp;A. M. Brovko","doi":"10.1134/S1062873825010010","DOIUrl":"10.1134/S1062873825010010","url":null,"abstract":"","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"165 - 165"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calculations for a Relativistic Gyrotron in the Range of 300 GHz, Allowing for the True Shape of the Accelerating Voltage Pulse 300 千兆赫范围内相对论陀螺仪的计算，考虑到加速电压脉冲的真实形状
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709279
A. N. Leontyev, R. M. Rozental, O. P. Plankin, E. S. Semenov
{"title":"Calculations for a Relativistic Gyrotron in the Range of 300 GHz, Allowing for the True Shape of the Accelerating Voltage Pulse","authors":"A. N. Leontyev,&nbsp;R. M. Rozental,&nbsp;O. P. Plankin,&nbsp;E. S. Semenov","doi":"10.1134/S1062873824709279","DOIUrl":"10.1134/S1062873824709279","url":null,"abstract":"<p>Calculations are made for a relativistic gyrotron in the range of 300 GHz with power of up to 8 MW. Large-particle 3D modeling is used to calculate the shape of the output power pulse for the experimentally measured shape of accelerating voltage pulse. It is shown that the full energy of radiation at the operating frequency can exceed 4 J.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"147 - 151"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamics of the Parameters of Pulses Propagating in a Medium with Anomalous Group Velocity Dispersion 脉冲在异常群速度色散介质中传播参数的动力学
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709164
V. A. Khalyapin, A. N. Bugay
{"title":"Dynamics of the Parameters of Pulses Propagating in a Medium with Anomalous Group Velocity Dispersion","authors":"V. A. Khalyapin,&nbsp;A. N. Bugay","doi":"10.1134/S1062873824709164","DOIUrl":"10.1134/S1062873824709164","url":null,"abstract":"<p>The so-called method of moments is used to obtain a system of equations for the parameters of a pulse propagating in an isotropic medium with dispersion in the form of a Duhamel integral. A criterion is found for the parameters of the pulse and the medium separating the modes of propagation of soliton-like pulses.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"71 - 74"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Laser-Driven Formation of Relativistic Electron Mirrors and Generation of Incoherent X-Rays 激光驱动的相对论性电子镜的形成和非相干x射线的产生
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709115
V. V. Kulagin, V. N. Kornienko, V. A. Cherepenin
{"title":"Laser-Driven Formation of Relativistic Electron Mirrors and Generation of Incoherent X-Rays","authors":"V. V. Kulagin,&nbsp;V. N. Kornienko,&nbsp;V. A. Cherepenin","doi":"10.1134/S1062873824709115","DOIUrl":"10.1134/S1062873824709115","url":null,"abstract":"<p>2D-PIC numerical simulations were performed to study the generation of X-rays by the interaction of an oncoming laser wave with a relativistic electron mirror formed by a powerful accelerating laser pulse from a plasma layer. The structure of the radiated field in the far zone was investigated, and the spectral density of the radiation field and the angular distribution of the pulse energy were found. Changing the parameters of the accelerating and counterpropagating waves allows one to control the characteristics of the radiation.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"37 - 43"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Superluminal Objects in Non-Equilibrium Media 非平衡介质中的超光速物体
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709097
S. V. Sazonov
{"title":"Superluminal Objects in Non-Equilibrium Media","authors":"S. V. Sazonov","doi":"10.1134/S1062873824709097","DOIUrl":"10.1134/S1062873824709097","url":null,"abstract":"<p>An analysis is performed of the superluminal propagation of resonant and quasi-resonant soliton-like laser pulses in non-equilibrium media. It is shown that such pulses are unstable. However, the superluminal propagation of these pulse profiles can be observed at the initial stage of an instability’s development, due to the mechanism of reshaping.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"27 - 31"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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