JETP Letters最新文献_第3页

Phonon-induced Spectral Line Broadening in Dye-doped Glass in Terms of Resonant Vibrational Modes: Tetra-tert-butylterrylene in Polyisobutylene 从共振振动模式看掺染玻璃中的声子诱导谱线展宽：聚异丁烯中的四叔丁基苯乙烯

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2024-08-24 DOI: 10.1134/s0021364024602884

A. O. Savostianov, A. V. Naumov

引用次数: 0

Theory of Composite Ramsey Sequences of Radiofrequency Pulses beyond the Rotating Wave Approximation 超越旋转波近似的射频脉冲复合拉姆齐序列理论

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2024-08-24 DOI: 10.1134/s0021364024602033

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

引用次数: 0

Photothermal Conversion and Laser-Induced Transformations in Silicon–Germanium Alloy Nanoparticles 硅锗合金纳米粒子中的光热转换和激光诱导转变

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2024-08-11 DOI: 10.1134/s0021364024601398

S. O. Gurbatov, A. V. Shevlyagin, A. Yu. Zhizhchenko, E. B. Modin, A. A. Kuchmizhak, S. I. Kudryashov

{"title":"Photothermal Conversion and Laser-Induced Transformations in Silicon–Germanium Alloy Nanoparticles","authors":"S. O. Gurbatov, A. V. Shevlyagin, A. Yu. Zhizhchenko, E. B. Modin, A. A. Kuchmizhak, S. I. Kudryashov","doi":"10.1134/s0021364024601398","DOIUrl":"https://doi.org/10.1134/s0021364024601398","url":null,"abstract":"Si1 – xGex alloy nanoparticles with controlled composition have been obtained by nanosecond laser ablation of silicon–germanium targets in isopropanol. The synthesized product exhibits a polycrystalline structure and a unimodal size distribution with a predominant content of microparticles and retains the stoichiometry of the composition of the targets used for the synthesis. Nanothermometry with the detection and analysis of a Raman signal from single alloy nanoparticles with a size of ~200 nm demonstrates a threefold increase (in comparison with nanoparticles of pure silicon) in the heating efficiency of a nanomaterial with the composition Si0.45Ge0.55 by 785-nm laser radiation falling into the first “transparency window” of biological tissues. Stimulated by continuous infrared radiation, the diffusion of silicon atoms to the surface (when heated to 650 K) and their oxidation lead to the gradual transformation of alloy nanoparticles into germanium clusters encapsulated in a SiOx matrix.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945213","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

Superconducting States in Metals with Toroidal Ordering 环状有序金属中的超导状态

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2024-08-11 DOI: 10.1134/s0021364024602689

V. P. Mineev

引用次数: 0

Disorder-Induced Singularity of the Quantum Metric 量子公设的无序奇异性

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2024-08-11 DOI: 10.1134/s0021364024601532

Z. Z. Alisultanov

引用次数: 0

Synthesis and Properties of 12442-family Superconductor 12442 层超导体的合成与特性

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2024-08-11 DOI: 10.1134/s0021364024602021

I. V. Zhuvagin, V. A. Vlasenko, A. S. Usoltsev, A. A. Gippius, K. S. Pervakov, A. R. Prishchepa, V. A. Prudkoglyad, S. Yu. Gavrilkin, A. D. Denishchenko, A. V. Sadakov

引用次数: 0

Reduced Characterization of Tunable Linear Photonic Integrated Circuits 降低可调谐线性光子集成电路的表征能力

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2024-08-11 DOI: 10.1134/s0021364024601477

L. V. Biguaa, K. G. Katamadzhe, B. I. Bantysh, Yu. I. Bogdanov

引用次数: 0

Origin of Optical Gain in Narrow ZnO Microrods with Whispering Gallery Modes 具有悄声画廊模式的窄 ZnO 微镜中光增益的起源

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2024-08-11 DOI: 10.1134/s0021364024601519

A. P. Tarasov, L. A. Zadorozhnaya, V. M. Kanevsky

引用次数: 0

Sign-Alternating Deviation of a Single-Particle Current–Voltage Characteristic of a Dirty SIN Junction 脏 SIN 结的单粒子电流-电压特性的符号偏差

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2024-08-11 DOI: 10.1134/s0021364024601490

V. Ya. Kirpichenkov, N. V. Kirpichenkova, E. R. Kulinichev

{"title":"Sign-Alternating Deviation of a Single-Particle Current–Voltage Characteristic of a Dirty SIN Junction","authors":"V. Ya. Kirpichenkov, N. V. Kirpichenkova, E. R. Kulinichev","doi":"10.1134/s0021364024601490","DOIUrl":"https://doi.org/10.1134/s0021364024601490","url":null,"abstract":"A formula for the single-particle current–voltage characteristic (J(V,T,c,beta )) of “dirty” (with low concentrations of identical nonmagnetic impurities in the disordered insulator layer) SIN junctions (S is a superconductor, I is a disordered insulator, and N is a normal metal) has been obtained in the region of low temperatures and voltages 0 ≤ |eV| ( ll ) T ( ll ) Δ0, where e is the elementary charge, Δ0 is the superconducting gap in the S edge of a junction at the temperature T = 0, V is the voltage across the junction, c ( ll ) 1 is the dimensionless concentration of impurities in the I layer, β = (ε0 – μ)/Δ0 is the dimensionless deviation of the single-impurity electron energy level ε0 relevant for this problem (on identical impurities in the I layer) from the electron chemical potential μ of the junction. It has been shown that an anomalously large sign-alternating deviation of the single-particle current–voltage characteristic of the dirty SIN junction from the value calculated by the existing theoretical expression is observed in a certain limited region Ωd(c, β) on the (c, β) parameter plane in the presence of random narrow-band quantum jumpers in the disordered I layer. A numerical example has demonstrated that the relative deviation of the single-particle current–voltage characteristic at typical values of the parameters of the dirty SIN junction in the region Ωd(c, β) can reach several orders of magnitude, which ensures the possibility of the experimental observation of this effect. The conditions for the applicability of the considered model of the dirty SIN junction have been discussed and the scheme of the corresponding experiment has been proposed.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945220","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

Masses of the u, d, and s Quarks u 夸克、d 夸克和 s 夸克的质量

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2024-08-11 DOI: 10.1134/s0021364024601544

A. A. Osipov

{"title":"Masses of the u, d, and s Quarks","authors":"A. A. Osipov","doi":"10.1134/s0021364024601544","DOIUrl":"https://doi.org/10.1134/s0021364024601544","url":null,"abstract":"Ratios ms/md and mu/md of the light quark masses have been determined from expressions for squared masses of pseudoscalar mesons (m_{pi }^{2}) and (m_{K}^{2}) obtained with an accuracy of the second order in chiral symmetry breaking. The fit of the theoretical expressions for (m_{pi }^{2}) and (m_{K}^{2}) to their phenomenological values leads to a functional relation between the ratios ms/md and mu/md, which is described by a third-order curve. The application of the lattice calculation result ms/mud = 27.23(10), where mud = (mu + md)/2, reported by the flavor lattice averaging group (FLAG) for the case of four quark flavors provides an additional constraint, which significantly reduces the error (~2%) for the ratio mu/md = 0.455(8). The absolute values of the quark masses have been then obtained.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945212","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