JETP Letters最新文献_第2页

Bright–Dark Light Bullets Under Third Harmonic Generation Conditions 三次谐波产生条件下的明暗光弹

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-08-22 DOI: 10.1134/S002136402660165X

S. V. Sazonov

引用次数: 0

Dependence of the Formation of the Gamma Spectrum of the 137Cs Radionuclide on the Thickness of the Material Layer: GEANT4 Simulation 137Cs放射性核素γ谱的形成与材料层厚度的关系：GEANT4模拟

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-08-22 DOI: 10.1134/S0021364026606962

V. O. Solov’ev, A. V. Puchkov, G. V. Zhukov, E. Yu. Yakovlev

引用次数: 0

Relationship Between the Magnetoelectric Effect and Local Magnetic and Electric Moments in Paramagnetic Terbium Langasite 顺磁性碲Langasite中磁电效应与局部磁矩和电矩的关系

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-08-22 DOI: 10.1134/S0021364026601260

A. Yu. Tikhanovskii, V. Yu. Ivanov, A. M. Kuzmenko, A. A. Mukhin

{"title":"Relationship Between the Magnetoelectric Effect and Local Magnetic and Electric Moments in Paramagnetic Terbium Langasite","authors":"A. Yu. Tikhanovskii, V. Yu. Ivanov, A. M. Kuzmenko, A. A. Mukhin","doi":"10.1134/S0021364026601260","DOIUrl":"10.1134/S0021364026601260","url":null,"abstract":"Magnetic field-induced anisotropic electric polarization has been detected in langasite single crystals doped with magnetic rare-earth Tb ions (5%). This polarization strongly depends on the field magnitude and orientation. A sharp change in the polarization sign has been observed upon magnetic field rotation in the basal plane, which correlates with the reversal of the anisotropic (Ising) magnetic moments of Tb3+ ions along local two-fold axes. A microscopic approach has been proposed suggesting the superposition of local polarizations of single-ion origin in three nonequivalent sites of Tb ions. This has allowed us to identify the relationship between macroscopic and local polarizations and to establish that the latter is almost orthogonal to the Ising axis of Tb ions in the corresponding site, linearly depends on the magnetic field (upon Tb moment saturation), and changes sign upon the reversal of Tb moments. The parameters of the magnetoelectric interaction have been determined, which have made it possible to estimate the local electric dipole moment of ~0.1 D per Tb ion in a field of 5 T.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"124 1","pages":"49 - 57"},"PeriodicalIF":1.1,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364026601260.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148807419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lateral Current Supply Scheme for Spin-Trigger Josephson Valves 自旋触发约瑟夫森阀的横向电流供应方案

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-08-22 DOI: 10.1134/S0021364026606846

A. A. Neilo, V. I. Ruzhitskiy, N. V. Klenov, I. I. Soloviev, Z. Wang, M. Yu. Kupriyanov, S. V. Bakurskiy

{"title":"Lateral Current Supply Scheme for Spin-Trigger Josephson Valves","authors":"A. A. Neilo, V. I. Ruzhitskiy, N. V. Klenov, I. I. Soloviev, Z. Wang, M. Yu. Kupriyanov, S. V. Bakurskiy","doi":"10.1134/S0021364026606846","DOIUrl":"10.1134/S0021364026606846","url":null,"abstract":"Current transport in an SF1S1F2sIS Josephson junction, where one of the superconducting (S) electrodes is implemented as a spin valve (SF1S1F2s) and I is the tunnel insulating barrier, has been studied. In such a valve, the state of the thin s layer is controlled by changing the relative orientation of the magnetization vectors of the ferromagnetic layers F1 and F2. The dependences of the critical current density Jc on the temperature, as well as on the thicknesses of the ferromagnetic and superconducting layers, are calculated for two experimentally relevant current supply scenarios: through the outer S electrode and through the thin s film of the spin valve. It has been shown that the current supply through the s film provides higher absolute values of Jc and preserves the sign of the first harmonic of the current–phase dependence even in the 0–π transition mode of the magnetic subsystem. The obtained results specify the applicability limits of simplified models of direct current flow and formulate practical criteria for interpreting experiments and designing planar Josephson spin valves.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"124 1","pages":"65 - 72"},"PeriodicalIF":1.1,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364026606846.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148807367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of Grating Disorder in Resonant Smith–Purcell Radiation 光栅无序在共振Smith-Purcell辐射中的作用

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-08-22 DOI: 10.1134/S0021364026601296

D. Yu. Sergeeva, A. A. Tishchenko

{"title":"Role of Grating Disorder in Resonant Smith–Purcell Radiation","authors":"D. Yu. Sergeeva, A. A. Tishchenko","doi":"10.1134/S0021364026601296","DOIUrl":"10.1134/S0021364026601296","url":null,"abstract":"Smith–Purcell radiation from metasurfaces is becoming an increasingly popular object for theoretical and experimental study. Gratings consisting of resonant elements are the most attractive target in this area, as they emit enhanced radiation. Despite the rapid progress in nanotechnology, statistical errors arise during the manufacturing of metasurfaces and can lead to significant changes in radiation properties. In this work, we theoretically analyze the resonant Smith–Purcell radiation from a disordered array of dimers of interacting sub-wavelength particles. Two sources of statistical errors are considered: disorder in the period of the grating and misalignment of particles within each dimer. We show that the spectral characteristics of the Smith–Purcell radiation strongly depend on the ratio of the Smith–Purcell radiation harmonic and resonant frequencies. The disorder can lead to a shift in the frequency at which the most intense radiation is emitted, depending on which process dominates – the coherent one or the resonant one. In general, our results show that resonant Smith–Purcell radiation, when resonant frequency of close to one of the Smith–Purcell radiation harmonics, is much more robust than conventional Smith–Purcell radiation. Our theory helps to estimate the accuracy with which it is necessary to produce gratings for purposes of photonics and nanoelectronics, and is also important for designing and interpreting the experiments on Smith–Purcell radiation from 2D flat structures, including metasurfaces, flat photonic and plasmonic crystals, which are actively studied in optics today.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"124 1","pages":"7 - 14"},"PeriodicalIF":1.1,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148807415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetophonon Resonance in n-InGaAs Ternary Quantum Well Compounds n-InGaAs三元量子阱化合物中的磁声子共振

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-08-22 DOI: 10.1134/S0021364026607037

I. L. Drichko, I. Yu. Smirnov, M. O. Safonchik, M. A. Shakhov, M. Yu. Chernov, V. A. Solov’ev, S. V. Gudina, A. N. Vinichenko, A. Yu. Maslov

引用次数: 0

Optical Spectroscopy and Measurement of Ion Heating Rates in a Planar Trap 光谱学和平面阱中离子加热速率的测量

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-08-22 DOI: 10.1134/S0021364026607177

I. S. Gerasin, A. M. Russkikh, N. O. Zhadnov, K. S. Kudeyarov, I. V. Sherstov, I. A. Semerikov, N. N. Kolachevsky

引用次数: 0

Spectral–Angular Distributions of X-Ray Twisted Photons Emitted by Relativistic Electrons During Axial Channeling 相对论电子在轴向通道中发射的x射线扭曲光子的光谱角分布

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-08-22 DOI: 10.1134/S0021364026606822

K. B. Korotchenko, Yu. P. Kunashenko

引用次数: 0

Effect of a Supercritical CO2 Microstructure on Clustering in the Process of Expansion into a Vacuum 超临界CO2微观结构对真空膨胀过程中聚类的影响

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-07-31 DOI: 10.1134/S0021364026601090

T. A. Semenov, G. V. Mishakov, A. V. Lazarev, E. O. Epifanov, N. V. Minaev, E. I. Mareev

{"title":"Effect of a Supercritical CO2 Microstructure on Clustering in the Process of Expansion into a Vacuum","authors":"T. A. Semenov, G. V. Mishakov, A. V. Lazarev, E. O. Epifanov, N. V. Minaev, E. I. Mareev","doi":"10.1134/S0021364026601090","DOIUrl":"10.1134/S0021364026601090","url":null,"abstract":"The influence of the initial microstructure of supercritical carbon dioxide (scCO2) in the steady state in the process of its clustering during rapid expansion into a vacuum has been demonstrated. The molecular dynamics simulation has shown the presence of aggregates in the initial medium (P0 = 80–200 bar, T0 = 310–330 K) with a size distribution described by a bimodal lognormal function. One of the distribution modes corresponds to “large” aggregates with a diameter of 15–30 nm, characteristic of the Widom delta (a region on the phase diagram near the critical point). Mie scattering diagnostic has been used to establish the relationship between the fluid microstructure in a supercritical reactor and clustering in the process of expansion of a CO2 jet into a vacuum. It has been experimentally shown that the cluster size distribution in the expanding jet is also described by a bimodal lognormal function with a mode of large clusters of 50–80 nm in size. It has been found that the concentration of large clusters in the jet changes linearly with the concentration of large aggregates for the Widom delta.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"123 12","pages":"843 - 850"},"PeriodicalIF":1.1,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148615039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlations of Optical Wave Phase Gradients in a Stratified Turbulent Atmosphere 层状湍流大气中光波相位梯度的相关性

IF 1.1 4区物理与天体物理

JETP Letters Pub Date : 2026-07-31 DOI: 10.1134/S0021364026601570

A. V. Nemtseva, F. A. Starikov

引用次数: 0