发布求助
文献互助 智能选刊 最新文献

JETP Letters最新文献

筛选
英文 中文
Why We Do Not See the Radiative Decays of the (D_{{s1}}^{ + })(2536) Meson? 为什么我们看不到(D_{{s1}}^{ + })（2536）介子的辐射衰减？
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-10 DOI: 10.1134/S0021364024605037
A. Bondar
{"title":"Why We Do Not See the Radiative Decays of the (D_{{s1}}^{ + })(2536) Meson?","authors":"A. Bondar","doi":"10.1134/S0021364024605037","DOIUrl":"10.1134/S0021364024605037","url":null,"abstract":"<p>The radiative decays of <span>({{D}_{{s1}}}{{(2536)}^{ + }})</span> charmed-strange meson have not been observed. We employ the available Babar measurements to derive an upper bound for the <span>({{D}_{{s1}}}{{(2536)}^{ + }} to D_{s}^{ + }gamma )</span> decay width and discuss its implications for the quark structure of <span>({{D}_{{s1}}}{{(2460)}^{ + }})</span>.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 4","pages":"231 - 235"},"PeriodicalIF":1.4,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024605037.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740766","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
Computational Identification of Four Promising Nonlinear Optical Materials for Near and Middle Ultraviolet Operation 四种有前途的近中紫外非线性光学材料的计算鉴定
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-10 DOI: 10.1134/S0021364024605074
Y. Alkabakibi, D. D. Barma, D. V. Rybkovskiy, A. Tudi, C. Xie, A. R. Oganov
{"title":"Computational Identification of Four Promising Nonlinear Optical Materials for Near and Middle Ultraviolet Operation","authors":"Y. Alkabakibi,&nbsp;D. D. Barma,&nbsp;D. V. Rybkovskiy,&nbsp;A. Tudi,&nbsp;C. Xie,&nbsp;A. R. Oganov","doi":"10.1134/S0021364024605074","DOIUrl":"10.1134/S0021364024605074","url":null,"abstract":"<p>We perform a computational search for promising nonlinear optical materials by screening crystal structure databases. We selected non-centrosymmetric, thermodynamically stable and low-energy metastable borates, with large expected band gaps. For these structures, we performed density functional computations of the gap values, birefringence and nonlinear susceptibilities. Our search revealed four potentially efficient nonlinear borate materials with large band gaps, moderate birefringence and high nonlinear coefficients: K<sub>3</sub>B<sub>6</sub>O<sub>10</sub>Cl, Ca<sub>5</sub>B<sub>3</sub>O<sub>9</sub>F, SrB<sub>4</sub>O<sub>7</sub>, Al<sub>4</sub>(B<sub>2</sub>O<sub>5</sub>)<sub>3</sub>.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 4","pages":"256 - 261"},"PeriodicalIF":1.4,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024605074.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740805","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
Coherent Transients with a Single Photon 单光子的相干瞬态
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-10 DOI: 10.1134/S0021364024605013
R. Shakhmuratov, A. Zinnatullin, F. Vagizov
{"title":"Coherent Transients with a Single Photon","authors":"R. Shakhmuratov,&nbsp;A. Zinnatullin,&nbsp;F. Vagizov","doi":"10.1134/S0021364024605013","DOIUrl":"10.1134/S0021364024605013","url":null,"abstract":"<p>Reversible coherent transients induced by a single photon in an ensemble of resonant particles are considered. It can be shown that a phase shift of a single photon wave packet produces its re-emission by these particles. As an example, the resonant interaction of a single gamma-photon with Mössbauer nuclei is theoretically analyzed. This example has interesting applications in such areas as information transmission and measuring of sub-angstrom vibrations of thin films for creating of sub-angstrom etalon displacements, which can be used for sensor calibration. We show that coherent transients that are governed by the time evolution of a population of nuclear excited states can be detected not only in the transmission of photons through resonant absorbers, but also directly in the time evolution of a population of nuclear excited states. These states experience radiative decay and also emit conversion electrons. The detection of conversion electrons provides information about the excited state population of nuclei located nearby the surface of the radiation incidence on the absorber. This is because of short mean free path (or escape depth) of these electrons in the bulk.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 4","pages":"249 - 255"},"PeriodicalIF":1.4,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740806","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
Single-Photon Emission in the Telecom C-Band in a Micropillar Cavity with an InAs/InGaAs Quantum Dot 带InAs/InGaAs量子点的微柱腔中电信c波段单光子发射
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-01-27 DOI: 10.1134/S0021364024605116
A. I. Veretennikov, M. V. Rakhlin, Yu. M. Serov, A. I. Galimov, G. P. Veyshtort, S. V. Sorokin, G. V. Klimko, I. V. Sedova, N. A. Maleev, M. A. Bobrov, A. P. Vasiliev, A. G. Kuzmenkov, M. M. Kulagina, Yu. M. Zadiranov, S. I. Troshkov, Yu. A. Salii, D. S. Berezina, E. V. Nikitina, A. A. Toropov
{"title":"Single-Photon Emission in the Telecom C-Band in a Micropillar Cavity with an InAs/InGaAs Quantum Dot","authors":"A. I. Veretennikov,&nbsp;M. V. Rakhlin,&nbsp;Yu. M. Serov,&nbsp;A. I. Galimov,&nbsp;G. P. Veyshtort,&nbsp;S. V. Sorokin,&nbsp;G. V. Klimko,&nbsp;I. V. Sedova,&nbsp;N. A. Maleev,&nbsp;M. A. Bobrov,&nbsp;A. P. Vasiliev,&nbsp;A. G. Kuzmenkov,&nbsp;M. M. Kulagina,&nbsp;Yu. M. Zadiranov,&nbsp;S. I. Troshkov,&nbsp;Yu. A. Salii,&nbsp;D. S. Berezina,&nbsp;E. V. Nikitina,&nbsp;A. A. Toropov","doi":"10.1134/S0021364024605116","DOIUrl":"10.1134/S0021364024605116","url":null,"abstract":"<p>We present the design and experimental demonstration of a micropillar metamorphic cavity structure with an embedded InAs/InGaAs quantum dot, intended for single-photon generation in the telecommunication C‑band. The microcavity, incorporating a single GaAs/AlGaAs distributed Bragg reflector, is designed to provide a photon extraction efficiency of 15% into a numerical aperture of 0.7. The structure, fabricated by molecular beam epitaxy, photolithography, and plasma-enhanced chemical etching, exhibited an average C‑band photon emission rate of <span>( sim )</span>1 MHz at the first lens with a second-order correlation function of <span>({{g}^{{(2)}}}(0))</span> = 0.14.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 3","pages":"170 - 174"},"PeriodicalIF":1.4,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024605116.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698466","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
Slow Interband Recombination Promotes an Anomalous Thermoelectric Response of the p–n Junctions 慢带间复合促进了p-n结的异常热电响应
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-01-27 DOI: 10.1134/S0021364024604810
A. S. Petrov, D. Svintsov
{"title":"Slow Interband Recombination Promotes an Anomalous Thermoelectric Response of the p–n Junctions","authors":"A. S. Petrov,&nbsp;D. Svintsov","doi":"10.1134/S0021364024604810","DOIUrl":"10.1134/S0021364024604810","url":null,"abstract":"<p>Thermoelectric effects in <i>p</i>–<i>n</i> junctions are widely used for energy generation with thermal gradients, creation of compact Peltier refrigerators and, most recently, for sensitive detection of infrared and terahertz radiation. It is conventionally assumed that electrons and holes creating thermoelectric current are in equilibrium and share the common quasi-Fermi level. We show that lack of interband equilibrium results in an anomalous sign and magnitude of thermoelectric voltage developed across the <i>p</i>–<i>n</i> junction. The anomalies appear provided the diffusion length of minority carriers exceeds the size of hot spot at the junction. Normal magnitude of thermoelectric voltage is partly restored if interband tunneling at the junction is allowed. The predicted effects can be relevant to the cryogenically cooled photodetectors based on bilayer graphene and mercury cadmium telluride quantum wells.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 3","pages":"214 - 219"},"PeriodicalIF":1.4,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024604810.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698468","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
Stellar Evolution and Axion-Like Particles: New Constraints and Hints from Globular Clusters in the GAIA DR3 Data 恒星演化和类轴子粒子：来自GAIA DR3数据中的球状星团的新约束和提示
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-01-27 DOI: 10.1134/S0021364024603798
S. V. Troitsky
{"title":"Stellar Evolution and Axion-Like Particles: New Constraints and Hints from Globular Clusters in the GAIA DR3 Data","authors":"S. V. Troitsky","doi":"10.1134/S0021364024603798","DOIUrl":"10.1134/S0021364024603798","url":null,"abstract":"<p>Axion-like particles (ALPs) are hypothetical pseudoscalar bosons, natural in extensions of the Standard Model. Their interactions with ordinary matter and radiation are suppressed, making it challenging to detect them in laboratory experiments. However, these particles, produced within stellar interiors, can provide an additional mechanism for energy loss, potentially influencing stellar evolution. Prominent methods for searching for such effects involve measuring the properties of red giants and helium-burning stars in globular clusters (GCs). Here we use published catalogs of stars selected as members of seven GCs on the basis of p-arallaxes and proper motions measured by <i>Gaia</i> (Data Release 3). Making use of previously derived theoretical relations and the new data, we find the upper limit on the ALP-electron coupling, <span>({{g}_{{ae}}} &lt; 5.2 times {{10}^{{ - 14}}})</span> (95% CL), and an indication (<span>(3.3sigma )</span>) to nonzero ALP-photon coupling, <span>({{g}_{{agamma }}} = (6.5_{{ - 1.3}}^{{ + 1.1}}) times {{10}^{{ - 11}}})</span> GeV<sup>–1</sup>. Given the precision of contemporary observational data, it is imperative to refine ALP constraints through more sophisticated analyses, which will be explored in detail elsewhere.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 3","pages":"159 - 165"},"PeriodicalIF":1.4,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603798.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698465","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
Atypical Violation of the Stokes–Einstein Relation in a Dense Binary Lennard-Jones Mixture 密集二元Lennard-Jones混合物中Stokes-Einstein关系的非典型破坏
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-01-27 DOI: 10.1134/S0021364024603038
Sh. Das, M. Priya
{"title":"Atypical Violation of the Stokes–Einstein Relation in a Dense Binary Lennard-Jones Mixture","authors":"Sh. Das,&nbsp;M. Priya","doi":"10.1134/S0021364024603038","DOIUrl":"10.1134/S0021364024603038","url":null,"abstract":"<p>We study the dynamics of particles in binary mixtures near the freezing transition using molecular dynamics simulations. The particles are considered to interact via a Lennard-Jones potential, and the impact of varying their size-ratio on their dynamics is examined. By calculating the mean-squared displacements and the self-intermediate scattering function of the particles, we find that introducing size disparity in an equimolar mixture at a constant packing fraction hinders particle movement, leading to a decrease in the self-diffusion coefficient. Additionally, as the size disparity increases, the local cage relaxation time becomes longer. Interestingly, the increase in the system’s viscosity does not correspond to an expected decrease in self-diffusion, resulting in an unusual violation of the Stokes–Einstein relation. Unlike typical glass-forming mixtures, where this violation parameter increases as temperature decreases, we observe the opposite behaviour.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 3","pages":"205 - 213"},"PeriodicalIF":1.4,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698467","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
Generalized Model of the Superconducting Sigma Neuron 超导Sigma神经元的广义模型
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-01-20 DOI: 10.1134/S0021364024603427
N. S. Shuravin, L. N. Karelina, A. S. Ionin, F. A. Razorenov, M. S. Sidel’nikov, S. V. Egorov, V. V. Bol’ginov
{"title":"Generalized Model of the Superconducting Sigma Neuron","authors":"N. S. Shuravin,&nbsp;L. N. Karelina,&nbsp;A. S. Ionin,&nbsp;F. A. Razorenov,&nbsp;M. S. Sidel’nikov,&nbsp;S. V. Egorov,&nbsp;V. V. Bol’ginov","doi":"10.1134/S0021364024603427","DOIUrl":"10.1134/S0021364024603427","url":null,"abstract":"<p>The superconducting sigma neuron is a single-junction interferometer, with a part of the circuit shunted by an additional inductance, which is also used to generate the output signal. It was previously predicted that the transfer function of this device would be close to the sigmoidal one at a certain relation between the values of inductance of its parts. This interferometer can be fabricated as a multilayer thin-film structure over a superconducting screen, which allows measuring the output magnetic flux in a single element. An analysis of the experimental data showed that the use of a superconducting screen did not ensure complete independence of the sigma neuron elements, as was assumed in the theoretical model. This paper presents a generalized model of the stationary state of a sigma neuron that takes into account the interaction between all its parts, including the input and readout elements.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 11","pages":"829 - 836"},"PeriodicalIF":1.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603427.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994825","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
Threshold Photogeneration of Biexcitons in Direct-Gap Semiconductor Nanocrystals 直接间隙半导体纳米晶体中双激子的阈值光产生
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-01-20 DOI: 10.1134/S0021364024603749
S. A. Fomichev, V. A. Burdov
{"title":"Threshold Photogeneration of Biexcitons in Direct-Gap Semiconductor Nanocrystals","authors":"S. A. Fomichev,&nbsp;V. A. Burdov","doi":"10.1134/S0021364024603749","DOIUrl":"10.1134/S0021364024603749","url":null,"abstract":"<p>The generation of two electron–hole pairs (a biexciton) in a nanocrystal of a direct-gap semiconductor with a nondegenerate conduction band upon the absorption of a single photon with the energy equal to twice the band gap of the nanocrystal is considered. It is shown that the process can take place only in the presence of the interaction of electrons both with each other and with the crystal-lattice field. The rate of this process is calculated and found to depend strongly on the nanocrystal size.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 11","pages":"822 - 828"},"PeriodicalIF":1.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994829","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
Relaxation Phenomena in Dilute Charged Solutions 稀带电溶液中的弛豫现象
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-01-20 DOI: 10.1134/S0021364024604627
B. Timofeev, V. Shikin
{"title":"Relaxation Phenomena in Dilute Charged Solutions","authors":"B. Timofeev,&nbsp;V. Shikin","doi":"10.1134/S0021364024604627","DOIUrl":"10.1134/S0021364024604627","url":null,"abstract":"<p>The study of transport phenomena in conductive media of different dimensions often involves impedance diagnostics. The desire to exclude the influence of contact phenomena accompanying dc measurements on the current–voltage characteristic is a general reason for the application of complicated ac measurements instead of the quite methodologically simple dc regime. Relaxation phenomena in electrolytes with electrohydrodynamics linear in the density of the dopant <i>n</i><sub>d</sub> have been analyzed in detail in this work. It has been shown that the well-known Debye–Hückel–Onsager theory of the electrolyte conductivity cannot ensure the linearity of electrohydrodynamics of dilute solutions in the density <i>n</i><sub>d</sub>. Its linear alternative based on the theory of transport in finely dispersed two-phase systems called Maxwell formalism has been proposed. It has been shown that this allows one to interpret the observed relaxation time in the form <span>({{tau }_{c}} simeq RC)</span>, where <i>R</i> is the resistance of the bulk portion of a cell with an electrolyte in terms of the Maxwell formalism and <i>C</i> is the electrolytic capacitance of the metal–electrolyte transition regions appearing on its control electrodes. Examples of the successful use of <i>RC</i>-matched ac diagnostics have been discussed.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 11","pages":"843 - 853"},"PeriodicalIF":1.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994996","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信