JETP Letters最新文献_第3页

“Exact” Solutions for Circularly Polarized Solitons and Vortices in a Kerr Medium 克尔介质中圆极化孤子和漩涡的“精确”解

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-21 DOI: 10.1134/S0021364025600120

V. P. Ruban

{"title":"“Exact” Solutions for Circularly Polarized Solitons and Vortices in a Kerr Medium","authors":"V. P. Ruban","doi":"10.1134/S0021364025600120","DOIUrl":"10.1134/S0021364025600120","url":null,"abstract":"For the curl–curl type vector equation describing a monochromatic light wave in a Kerr medium, an exact substitution has been analyzed, which leads to a system of four first-order ordinary differential equations for functions of the transverse radial coordinate. This system includes the integer multiplicity m of a vortex in the longitudinal electric field component. In this case, the multiplicity of a vortex in a wave with the left and right circular polarizations is m – 1 and m + 1, respectively. With |m| = 1, numerical solutions of this system with appropriate boundary conditions make it possible to obtain the full information on the internal structure of a strongly nonlinear circularly polarized optical beam in a focusing medium taking into account the longitudinal field component and a small fraction of the opposite polarization. For m = 0, a solution in the form of a left-handed vortex in a left circularly polarized wave exists for a defocusing medium, which differs qualitatively from the right-handed vortex in the left circularly polarized wave for m = 2.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 5","pages":"354 - 359"},"PeriodicalIF":1.4,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364025600120.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856427","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

Long-Wavelength Intervalley Plasmons in Transition-Metal Dichalcogenide Monolayers 过渡金属二硫化物单层中的长波长谷间等离子体

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-21 DOI: 10.1134/S0021364025600107

R. Z. Vitlina, L. I. Magarill, A. V. Chaplik

引用次数: 0

Generation of Bright X-Ray Radiation in the Wavelength Range of 15–27 nm under Excitation of a Gas Jet by Intense Phase-Modulated Near-Infrared Femtosecond Laser Pulses 强相位调制近红外飞秒激光脉冲在气体射流激发下产生15 - 27nm波长范围内的明亮x射线

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-21 DOI: 10.1134/S0021364024605414

B. V. Rumiantsev, E. A. Migal, E. A. Lobushkin, A. V. Pushkin, F. V. Potemkin

{"title":"Generation of Bright X-Ray Radiation in the Wavelength Range of 15–27 nm under Excitation of a Gas Jet by Intense Phase-Modulated Near-Infrared Femtosecond Laser Pulses","authors":"B. V. Rumiantsev, E. A. Migal, E. A. Lobushkin, A. V. Pushkin, F. V. Potemkin","doi":"10.1134/S0021364024605414","DOIUrl":"10.1134/S0021364024605414","url":null,"abstract":"A source of coherent X-ray radiation based on the high harmonic generation in a gaseous medium has been developed at the Moscow State University. The generation in an argon gas jet irradiated by femtosecond laser radiation of a Cr:forsterite laser system has been carried out for the first time. High harmonic radiation in the photon energy range of 45–83 eV (corresponding wavelengths from 27.6 to 14.9 nm) with a total generated photon flux 1.1 × 109 photons/s has been detected under optimal generation conditions. It has been shown that the compensation of self-phase modulation of the generating pulse by introducing negative quadratic phase modulation makes it possible to increase the generation efficiency in a wide range of generated harmonics from the low- to high-frequency plateau edge. It has also been found that such modulation allows one to reduce the divergence of high harmonics at the edge of the plateau and to increase the cutoff frequency. The developed compact bright X-ray source opens the way to obtaining attosecond laser pulses in the Russian Federation, and can also be used to form a coherent seed in free-electron lasers and synchrotron radiation sources in order to increase the temporal coherence of their radiation.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 5","pages":"338 - 344"},"PeriodicalIF":1.4,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024605414.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856608","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

Intrinsic Anomalous Hall Effect on the Surface of a Magnetic Semiconductor with the Strong Rashba Effect 具有强拉什巴效应的磁性半导体表面的本征反常霍尔效应

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-21 DOI: 10.1134/S0021364024605268

V. N. Men’shov, I. P. Rusinov, E. V. Chulkov

引用次数: 0

Optical Clock Based on Two-Photon Spectroscopy of the Nuclear Transition in a 229Th Ion in a Monochromatic Field 基于单色场中229离子核跃迁双光子光谱的光钟

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-21 DOI: 10.1134/S0021364025600090

V. I. Yudin, A. V. Taichenachev, O. N. Prudnikov, M. Yu. Basalaev, A. N. Goncharov, S. V. Chepurov, V. G. Pal’chikov

{"title":"Optical Clock Based on Two-Photon Spectroscopy of the Nuclear Transition in a 229Th Ion in a Monochromatic Field","authors":"V. I. Yudin, A. V. Taichenachev, O. N. Prudnikov, M. Yu. Basalaev, A. N. Goncharov, S. V. Chepurov, V. G. Pal’chikov","doi":"10.1134/S0021364025600090","DOIUrl":"10.1134/S0021364025600090","url":null,"abstract":"The possibility of two-photon laser spectroscopy of the nuclear clock transition (148.38 nm) in the 229Th isotope has been investigated using an intense monochromatic laser field at twice the wavelength (296.76 nm). Our estimates show that due to the electron bridge process in the doubly ionized ion 229Th2+ the sufficient intensity of a continuous laser field is about 10–100 kW/cm2, which is within the reach of modern laser systems. This unique possibility is an result of the presence in the electronic spectrum of the ion 229Th2+ of an exceptionally close intermediate (for the two-photon transition) energy level, forming a strong dipole ((E1)) transition with the ground state at the wavelength of 297.86 nm, which differs from the probe field wavelength (296.76 nm) by only 1.1 nm. The obtained results can be used for the practical creation of ultra-precise nuclear optical clocks based on thorium-229 ions without using vacuum ultraviolet. Moreover, we develop an alternative approach to the description of the electron bridge phenomenon in an isolated ion (atom) using the hyperfine interaction operator, that is important for the general quantum theory of an atom. In particular, this approach shows that the contribution to the electron bridge from the nuclear quadrupole moment can be comparable to the contribution from the nuclear magnetic moment.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 5","pages":"345 - 353"},"PeriodicalIF":1.4,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364025600090.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856430","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

Spin Current at the 5d–3d Interface of Epitaxial Oxide Films (Brief Review) 外延氧化膜5d-3d界面处的自旋电流（综述）

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-21 DOI: 10.1134/S002136402560017X

G. A. Ovsyannikov, K. I. Konstantinyan, G. D. Ul’ev, I. E. Moskal’

{"title":"Spin Current at the 5d–3d Interface of Epitaxial Oxide Films (Brief Review)","authors":"G. A. Ovsyannikov, K. I. Konstantinyan, G. D. Ul’ev, I. E. Moskal’","doi":"10.1134/S002136402560017X","DOIUrl":"10.1134/S002136402560017X","url":null,"abstract":"Experimental studies of the electrophysical and magnetic properties of a heterostructure of complex SrIrO3/La0.7Sr0.3MnO3 oxides, where a spin current is observed under ferromagnetic resonance conditions, have been reviewed. thin films of 5d strontium iridate SrIrO3 with a strong spin–orbit coupling and 3d strontium manganite La0.7Sr0.3MnO3 have been grown epitaxially on a (110) NdGaO3 single-crystal substrate by magnetron sputtering at a high substrate temperature of 7000–8000°C in a mixture of argon and oxygen gases at a total pressure of 0.3 mbar. The spin mixing conductance of the interface, which has real (Reg↑↓) and imaginary (Img↑↓) parts, has been determined from the frequency dependences (in the range of 2–20 GHz) of the linewidth and the resonant field of the ferromagnetic resonance of the SrIrO3/La0.7Sr0.3MnO3 heterostructure. The spin Hall angle θSH, which characterizes the efficiency of the conversion of the spin current into an electric current in the presence of the inverse spin Hall effect, has been calculated from the data on the spin magnetoresistance of the SrIrO3/La0.7Sr0.3MnO3 heterostructure. The spin Hall angle θSH of the SrIrO3/La0.7Sr0.3MnO3 heterostructure turns out to be significantly larger (by a factor of almost 40) than that for the Pt/La0.7Sr0.3MnO3 heterostructure.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 5","pages":"381 - 390"},"PeriodicalIF":1.4,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S002136402560017X.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856432","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

Decomposition of a Video Pulse into Traveling and Evanescent Waves 视频脉冲分解为行波和倏逝波

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-21 DOI: 10.1134/S0021364024604950

I. V. Bubenshchikov, A. A. Tityapkin, V. V. Zalipaev, A. D. Kiselev, S. A. Kozlov

{"title":"Decomposition of a Video Pulse into Traveling and Evanescent Waves","authors":"I. V. Bubenshchikov, A. A. Tityapkin, V. V. Zalipaev, A. D. Kiselev, S. A. Kozlov","doi":"10.1134/S0021364024604950","DOIUrl":"10.1134/S0021364024604950","url":null,"abstract":"Using the general solution of the wave equation for the empty space (vacuum), it has been shown that spatially limited video pulses may exist in it. However, video pulses in the empty space necessarily consist of two components: traveling and evanescent waves. It has been demonstrated that such structures can be created immediately beyond the interface between an optically dense medium and the empty space, as in near-field optics. In this work, the traveling and evanescent components are illustrated for a video pulse with Gaussian temporal and spatial profiles. It has been shown that the traveling wave is a one-and-half cycle pulse and its duration is determined by the ratio of the transverse and longitudinal dimensions of the video pulse. The same ratio also determines the distance at which the evanescent wave decays, and the video pulse becomes a few-cycle traveling wave. Using Gauss’s theorem, it has been demonstrated that transversely limited video pulses are not unipolar. The transverse and longitudinal components of their field perpendicular and parallel to the wave propagation axis, respectively, can be comparable in magnitude and differ in the character of their time evolution.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 5","pages":"332 - 337"},"PeriodicalIF":1.4,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856607","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

Electronic Thermoelectric Properties of MgXY2Z2 Double Half-Heusler Alloys (X = Zr/Hf, Y = Pd/Pt, Z = Bi/Sb) MgXY2Z2双半heusler合金（X = Zr/Hf, Y = Pd/Pt, Z = Bi/Sb）的电子热电性能

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-01 DOI: 10.1134/S0021364025600016

A. N. Filanovich, A. V. Lukoyanov, A. A. Povzner

引用次数: 0

Oscillations in Cross Sections for Single-Electron Charge Exchange in Collisions of Positive Ions with a Hydrogen Molecule 正离子与氢分子碰撞中单电子电荷交换的截面振荡

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-01 DOI: 10.1134/S0021364024604342

F. F. Goryaev

引用次数: 0

Magnetoelectric Effect in the Nd3Ga5SiO14 Paramagnet Nd3Ga5SiO14顺磁体中的磁电效应

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-01 DOI: 10.1134/S0021364024605244

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

{"title":"Magnetoelectric Effect in the Nd3Ga5SiO14 Paramagnet","authors":"A. A. Mukhin, V. Yu. Ivanov, A. M. Kuzmenko, A. Yu. Tikhanovskii, B. V. Mill","doi":"10.1134/S0021364024605244","DOIUrl":"10.1134/S0021364024605244","url":null,"abstract":"The electric polarization induced by a magnetic field H in Nd3Ga5SiO14 noncentrosymmetric trigonal paramagnetic single crystals has been detected. In low fields, it is quadratic in H and its components in the basal ab plane are described by two magnetoelectric susceptibilities α1 and α2. The polarization along the trigonal c axis is manifested only starting from the fourth-order terms ~H4. In high magnetic fields at low temperatures, when the magnetic moments of Nd3+ are saturated, the polarization qualitatively changes its field dependence to nearly quasilinear for all crystallographic directions and increases strongly (up to 250 μC/m2 at 5 T along the c axis). The effects observed in Nd3Ga5SiO14 have been quantitatively described using the spin Hamiltonian of the Nd3+ ion in local low-symmetric (C2) sites taking into account the magnetoelectric interaction allowed by symmetry. Magnetoelectric invariants nonlinear in H that make it possible to describe the observed the field, temperature, and angular dependences of the polarization using several magnetoelectric parameters have been constructed in terms of the local susceptibilities of Nd3+ ions taking into account the nonequivalence of their magnetization.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 4","pages":"292 - 300"},"PeriodicalIF":1.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740760","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