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Electromagnetic Transparency of a Magnetic Heterostructure under the Multiwave Interference Conditions 多波干扰条件下磁性异质结构的电磁透射率
IF 1.3 4区 物理与天体物理
JETP Letters Pub Date : 2024-06-24 DOI: 10.1134/s0021364024601039
O. S. Sukhorukova, A. S. Tarasenko, S. V. Tarasenko, V. G. Shavrov
{"title":"Electromagnetic Transparency of a Magnetic Heterostructure under the Multiwave Interference Conditions","authors":"O. S. Sukhorukova, A. S. Tarasenko, S. V. Tarasenko, V. G. Shavrov","doi":"10.1134/s0021364024601039","DOIUrl":"https://doi.org/10.1134/s0021364024601039","url":null,"abstract":"<p>Features of resonant photon transmission that are due to the hybridization of gyrotropy and spatial dispersion, which are two independent mechanisms for the collapse of the Fano resonance, have been studied in a layer of an optically transparent magnetic dielectric between two identical anisotropically conducting metasurfaces, as well as in a finite one-dimensional superlattice with the same elementary period. In particular, it has been shown that the appearance of interference-type “dark” states with zero radiative width in the emission spectrum of radiative polaritons can be accompanied by the suppression of the full electromagnetic transparency of the layer, which is inherent in the two-mode model of the formation of such bound states in the continuum. The radiative polariton mode simultaneously appearing in the layer can become superradiant for a photonic crystal of the considered type, which will lead to almost total photon reflection.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141528383","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
Thermal Transformations of Ferrocene Fe(C5H5)2 at a Pressure of 10 GPa and Temperatures up to 2200 K 二茂铁 Fe(C5H5)2 在 10 GPa 压力和高达 2200 K 温度下的热转变
IF 1.3 4区 物理与天体物理
JETP Letters Pub Date : 2024-06-24 DOI: 10.1134/s0021364024600927
S. S. Starchikov, V. A. Zayakhanov, I. A. Troyan, A. A. Bykov, K. M. Bulatov, A. L. Vasiliev, D. S. Perekalin, N. I. Snegirev, E. S. Kulikova, V. A. Davydov, I. S. Lyubutin
{"title":"Thermal Transformations of Ferrocene Fe(C5H5)2 at a Pressure of 10 GPa and Temperatures up to 2200 K","authors":"S. S. Starchikov, V. A. Zayakhanov, I. A. Troyan, A. A. Bykov, K. M. Bulatov, A. L. Vasiliev, D. S. Perekalin, N. I. Snegirev, E. S. Kulikova, V. A. Davydov, I. S. Lyubutin","doi":"10.1134/s0021364024600927","DOIUrl":"https://doi.org/10.1134/s0021364024600927","url":null,"abstract":"<p>Specific features of thermal transformations of ferrocene Fe(C<sub>5</sub>H<sub>5</sub>)<sub>2</sub> at a pressure of 10 GPa upon laser heating to 2200 K have been investigated in diamond anvil cells. Maps of the temperature distribution on the sample during the heating have been obtained. The structure and properties of the transformation products have been studied by X-ray diffraction analysis, transmission electron microscopy, and Mössbauer spectroscopy. It is established that a characteristic feature of ferrocene transformations upon laser heating is the simultaneous formation of nanoparticles of iron (α-Fe) and iron carbide (Fe<sub>7</sub>C<sub>3</sub>) crystalline phases. The presence of α-Fe in the products of thermal transformations of ferrocene at high pressures has been observed for the first time. Possible mechanisms of the simultaneous formation of these nanoparticles during ferrocene transformations are discussed.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141528379","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
Theoretical Study of the Epitaxial Strain Effect on the Structural and Magnetic Properties of a YFeO3 Thin Film on a SrTiO3 Substrate 外延应变对晶钛氧化物（SrTiO3）基底上 YFeO3 薄膜的结构和磁性能影响的理论研究
IF 1.3 4区 物理与天体物理
JETP Letters Pub Date : 2024-06-24 DOI: 10.1134/s0021364024601027
G. S. Dedov, A. O. Shorikov
{"title":"Theoretical Study of the Epitaxial Strain Effect on the Structural and Magnetic Properties of a YFeO3 Thin Film on a SrTiO3 Substrate","authors":"G. S. Dedov, A. O. Shorikov","doi":"10.1134/s0021364024601027","DOIUrl":"https://doi.org/10.1134/s0021364024601027","url":null,"abstract":"<p>The electronic structure and magnetic properties of a YFeO<sub>3</sub> thin film deposited on a SrTiO<sub>3</sub> substrate are studied using the GGA+<i>U</i> method. It is shown that the epitaxial strain in the YFeO<sub>3</sub>/SrTiO<sub>3</sub> thin film significantly changes the crystal structure and displaces iron atoms located at the film surface from the plane formed by the nearest oxygen atoms. These distortions lead to a change in the type of long-range magnetic ordering from the G-type antiferromagnetic ordering observed in stoichiometric YFeO<sub>3</sub> to ferrimagnetic ordering close to the A-type antiferromagnetism and to the transition from the insulating state to metallic one. The complete relaxation of atomic positions gives rise to a “breathing mode” distortion in the film bulk, which is accompanied by the electric polarization of 15.1 μC/cm<sup>2</sup>. The latter is in agreement with the experiment. The distortion of oxygen octahedra surrounding iron atoms leads to the transition from the high-spin state to the intermediate-spin state and to a stepwise decrease in local magnetic moments.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141528382","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
Stability of the Formation of an Image Using a Terajet with Respect to the Beam Shift 使用 Terajet 形成图像时光束偏移的稳定性
IF 1.3 4区 物理与天体物理
JETP Letters Pub Date : 2024-06-24 DOI: 10.1134/s0021364024600939
A. G. Paddubskaya, A. V. Novitsky, O. V. Minin, I. V. Minin
{"title":"Stability of the Formation of an Image Using a Terajet with Respect to the Beam Shift","authors":"A. G. Paddubskaya, A. V. Novitsky, O. V. Minin, I. V. Minin","doi":"10.1134/s0021364024600939","DOIUrl":"https://doi.org/10.1134/s0021364024600939","url":null,"abstract":"<p>The shift of an image of a dielectric sphere asymmetrically irradiated by a terahertz Gaussian beam in terahertz imaging systems has been demonstrated experimentally. Numerical calculations using the operator scattering theory have shown the bending of the localization region of the electromagnetic field near the shadow surface of the dielectric sphere when it is shifted with respect to the waist center of the Gaussian beam, leading to the formation of the so-called “photonic hook” with the properties depending on the polarization and frequency of the incident radiation. The possibility of reaching a spatial resolution of 0.38λ in the studied range has been shown experimentally. The obtained results can be used to increase the resolution of commercial scanning terahertz systems.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141528378","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
Torsion-Rotational Transitions in Methanol as a Probe of Fundamental Physical Constants—Electron and Proton Masses 甲醇中的扭转-旋转转变是基本物理常数--电子和质子质量的探针
IF 1.3 4区 物理与天体物理
JETP Letters Pub Date : 2024-06-24 DOI: 10.1134/s0021364024600952
J. S. Vorotyntseva, S. A. Levshakov
{"title":"Torsion-Rotational Transitions in Methanol as a Probe of Fundamental Physical Constants—Electron and Proton Masses","authors":"J. S. Vorotyntseva, S. A. Levshakov","doi":"10.1134/s0021364024600952","DOIUrl":"https://doi.org/10.1134/s0021364024600952","url":null,"abstract":"<p>We report on the using of torsion-rotational transitions in the CH<sub>3</sub>OH and <sup>13</sup>CH<sub>3</sub>OH molecules to evaluate possible variations of the electron-to-proton mass ratio μ = <i>m</i><sub><i>e</i></sub>/<i>m</i><sub><i>p</i></sub> from spectral observations of emission lines detected in the microwave range towards the dense molecular cloud Orion-KL. An estimate of the upper limit on the relative changes in μ is obtained by two independent ways with <sup>13</sup>CH<sub>3</sub>OH lines and with the combination of <sup>13</sup>CH<sub>3</sub>OH and CH<sub>3</sub>OH lines. The calculated upper limit Δμ/μ &lt; 1.1 × 10<sup>–8</sup>(1σ) is in line with the most stringent constraints on the variability of fundamental physical constants established by other astrophysical methods.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141508284","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
Time-Resolved Detection of Terahertz Response in Photodynamically Induced Plasmonic Metasurfaces 光动力诱导等离子体元表面太赫兹响应的时间分辨探测
IF 1.3 4区 物理与天体物理
JETP Letters Pub Date : 2024-06-24 DOI: 10.1134/s0021364024601052
I. A. Novikov, M. A. Kiryanov, V. I. Stadnichuk, T. V. Dolgova, A. A. Fedyanin
{"title":"Time-Resolved Detection of Terahertz Response in Photodynamically Induced Plasmonic Metasurfaces","authors":"I. A. Novikov, M. A. Kiryanov, V. I. Stadnichuk, T. V. Dolgova, A. A. Fedyanin","doi":"10.1134/s0021364024601052","DOIUrl":"https://doi.org/10.1134/s0021364024601052","url":null,"abstract":"<p>A modification of terahertz time-domain spectroscopy is proposed. It includes the direct measurement of the temporal profile of the transmitted terahertz pulse, the extraction of the pulse corresponding to multiple reflections from the object surfaces, and its analysis without the Fourier transform algorithm. The method is tested on one-dimensional gratings that are photodynamically induced on the gallium arsenide surface and support the excitation of collective plasmonic modes in the terahertz range. The suggested approach allows us to overcome the limitations typical of the conventional terahertz time-domain spectroscopy and expands the capabilities of the existing terahertz photonic instrumentation.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141532300","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
Spin Pumping in YIG/Pt Structures: Role of van Hove Singularities YIG/Pt 结构中的自旋泵浦：范霍夫奇点的作用
IF 1.3 4区 物理与天体物理
JETP Letters Pub Date : 2024-06-24 DOI: 10.1134/s0021364024600502
Yu. V. Nikulin, Yu. V. Khivintsev, M. E. Seleznev, S. L. Vysotskii, V. K. Sakharov, A. V. Kozhevnikov, G. M. Dudko, A. G. Khitun, S. A. Nikitov, Yu. A. Filimonov
{"title":"Spin Pumping in YIG/Pt Structures: Role of van Hove Singularities","authors":"Yu. V. Nikulin, Yu. V. Khivintsev, M. E. Seleznev, S. L. Vysotskii, V. K. Sakharov, A. V. Kozhevnikov, G. M. Dudko, A. G. Khitun, S. A. Nikitov, Yu. A. Filimonov","doi":"10.1134/s0021364024600502","DOIUrl":"https://doi.org/10.1134/s0021364024600502","url":null,"abstract":"<p>The spin pumping in YIG/Pt structures by surface and backward volume magnetostatic waves has been studied experimentally. It has been shown that the efficiency of the generation of the spin current increases at frequencies of spin waves corresponding to van Hove singularities in the density of states. The results of this work are important for the development of magnon spintronics devices.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141528380","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
Giant Effective g-factor Due to Spin Bifurcations in Polariton Condensates 极化子凝聚态自旋分岔导致的巨有效 g 因子
IF 1.3 4区 物理与天体物理
JETP Letters Pub Date : 2024-06-19 DOI: 10.1134/s0021364024601349
A. Bochin, I. Chestnov, A. Nalitov
{"title":"Giant Effective g-factor Due to Spin Bifurcations in Polariton Condensates","authors":"A. Bochin, I. Chestnov, A. Nalitov","doi":"10.1134/s0021364024601349","DOIUrl":"https://doi.org/10.1134/s0021364024601349","url":null,"abstract":"<p>We predict giant susceptibility of spin-bifurcating polariton condensates to externally applied permanent magnetic field. In the presence of spin-anisotropic polariton-polariton interactions, the condensate spontaneously takes an elliptically polarised state, whose perturbation dynamics can be interpreted in terms of the presence of strong effective magnetic field significantly surpassing the external one. Surprisingly, this behaviour of the addressed strongly out-of-equilibrium system in the vicinity of a critical point exhibits intriguing analogy with the second-order phase transition. The predicted field-enhancement effect can be utilized for creation of topologically nontrivial states of Bogoliubov’s excitations existing on top of the polariton condensate.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141508287","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
Optical Spin Initialization of Nitrogen Vacancy Centers in a 28Si-Enriched 6H-SiC Crystal for Quantum Technologies 用于量子技术的 28Si-Enriched 6H-SiC 晶体中氮空位中心的光学自旋初始化
IF 1.3 4区 物理与天体物理
JETP Letters Pub Date : 2024-06-04 DOI: 10.1134/s0021364024600708
F. F. Murzakhanov, M. A. Sadovnikova, G. V. Mamin, D. V. Shurtakova, E. N. Mokhov, O. P. Kazarova, M. R. Gafurov
{"title":"Optical Spin Initialization of Nitrogen Vacancy Centers in a 28Si-Enriched 6H-SiC Crystal for Quantum Technologies","authors":"F. F. Murzakhanov, M. A. Sadovnikova, G. V. Mamin, D. V. Shurtakova, E. N. Mokhov, O. P. Kazarova, M. R. Gafurov","doi":"10.1134/s0021364024600708","DOIUrl":"https://doi.org/10.1134/s0021364024600708","url":null,"abstract":"<p>High-spin defect centers in crystal matrices are used in quantum computing technologies, highly sensitive sensors, and single-photon sources. In this work, optically active nitrogen-vacancy color centers NV<sup>–</sup> in a <sup>28</sup>Si-enriched (nuclear spin <span>(I = 0)</span>) 6H-<sup>28</sup>SiC crystal have been studied using the photoinduced (<span>(lambda )</span> = 980 nm) high-frequency (94 GHz, 3.4 T) pulsed electron paramagnetic resonance method at a temperature of <span>(T = 150{kern 1pt} )</span> K. Three structurally nonequivalent types of NV<sup>–</sup> centers with axial symmetry have been identified and their spectroscopic parameters have been determined. Long spin–lattice, <span>({{T}_{1}} = 1.3{kern 1pt} )</span> ms, and spin–spin, <span>({{T}_{2}} = 59{kern 1pt} )</span> μs, ensemble relaxation times of NV<sup>–</sup> centers with extremely narrow (450 kHz) absorption lines allow highly selective excitation of resonant transitions between sublevels <span>(({{m}_{I}}))</span> caused by the weak hyperfine interaction <span>((A approx 1{kern 1pt} )</span> MHz) with <sup>14</sup>N <span>((I = 1))</span> nuclei for the quantum manipulation of the electron spin magnetization.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255037","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
Collisions of Light Bullets with Different Circular Polarizations 不同圆偏振光子弹的碰撞
IF 1.3 4区 物理与天体物理
JETP Letters Pub Date : 2024-06-04 DOI: 10.1134/s0021364024600691
V. P. Ruban
{"title":"Collisions of Light Bullets with Different Circular Polarizations","authors":"V. P. Ruban","doi":"10.1134/s0021364024600691","DOIUrl":"https://doi.org/10.1134/s0021364024600691","url":null,"abstract":"<p>Collisions of left- and right-polarized spatiotemporal optical solitons have been numerically simulated for a locally isotropic focusing Kerr medium with anomalous chromatic dispersion. The stable propagation of such “light bullets” in a moderate nonlinear regime is ensured by a transverse parabolic profile of the refraction index in a multimode waveguide. The transverse motion of centers of mass of wave packets in such systems occurs on classical trajectories of a harmonic oscillator, whereas the motion in the longitudinal direction is uniform. Therefore, collisions of two solitons can be not only head-on but also tangential. An inelastic collision of two solitons with opposite circular polarizations can result either in two binary light bullets combining the left and right polarization or in more complex bound systems.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255031","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
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