JETP Letters最新文献

Nuclear Magnetic Resonance of the Spin Kinetics of 169Tm Nuclei in a Li(Y0.98Tm0.02)F4 Single Crystal Li(Y0.98Tm0.02)F4单晶中169Tm核自旋动力学的核磁共振研究

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2025-10-02 DOI: 10.1134/S0021364025606657

A. S. Parfishina, K. R. Safiullin, D. S. Nuzhina, E. M. Alakshin, A. G. Kiiamov, S. L. Korableva, A. A. Rodionov, M. S. Tagirov, I. V. Romanova

{"title":"Nuclear Magnetic Resonance of the Spin Kinetics of 169Tm Nuclei in a Li(Y0.98Tm0.02)F4 Single Crystal","authors":"A. S. Parfishina, K. R. Safiullin, D. S. Nuzhina, E. M. Alakshin, A. G. Kiiamov, S. L. Korableva, A. A. Rodionov, M. S. Tagirov, I. V. Romanova","doi":"10.1134/S0021364025606657","DOIUrl":"10.1134/S0021364025606657","url":null,"abstract":"The spin echo signal of 169Tm nuclei has been observed for the first time in the Li(Y0.98Tm0.02)F4 dilute Van Fleck paramagnet. The anisotropy of the longitudinal and transverse relaxation rates and the width of the nuclear magnetic resonance line of 169Tm nuclei relative to the [001] and [100] crystallographic axes has been detected. It has been shown that the main reason for the anisotropic behavior of relaxation rates is the dispersion of local magnetic fields of 169Tm rare-earth nuclei due to the dipole–dipole interaction with surrounding magnetic ions. The correlation time of the hyperfine magnetic field on the 169Tm nucleus has been estimated, which confirms its direct relationship to the longitudinal relaxation time of electron moments in the doublet excited state. The lifetime of the thulium ion in the excited state has been found to be approximately an order of magnitude longer than that in a LiTmF4 single crystal.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"122 4","pages":"244 - 249"},"PeriodicalIF":1.3,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204668","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

Violation of P and T Symmetries and Magnetogalvanic Effects in Metallic Antiferromagnets 金属反铁磁体中P和T对称的破坏和磁电效应

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2025-10-02 DOI: 10.1134/S0021364025607432

Z. V. Gareeva, K. A. Zvezdin, A. I. Popov, A. K. Zvezdin

引用次数: 0

Effects of Strong Turbulence for Water Waves 强湍流对水波的影响

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2025-10-02 DOI: 10.1134/S0021364025607973

E. A. Kochurin, E. A. Kuznetsov

引用次数: 0

On the Discontinuities of Multiparticle Amplitudes 关于多粒子振幅的不连续

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2025-10-02 DOI: 10.1134/S0021364025608048

V. S. Fadin

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Robustness of Nematic Superconductivity in SrxBi2Se3 to Magnetic Doping SrxBi2Se3向列超导性对磁掺杂的鲁棒性

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2025-10-02 DOI: 10.1134/S002136402560781X

M. I. Bannikov, Yu. G. Selivanov, V. P. Martovitsky, A. Yu. Kuntsevich

引用次数: 0

Semiconductor Disk Laser Based on a GaInP/AlGaInP Heterostructure with Intracavity Pumping into Quantum Wells 基于量子阱内泵浦GaInP/AlGaInP异质结构的半导体圆盘激光器

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2025-10-02 DOI: 10.1134/S0021364025607717

A. A. Elsherbini, V. I. Kozlovsky, Ya. K. Skasyrsky, M. P. Frolov

引用次数: 0

Use of Superradiance Pulses to Pump Multi-Pass Terahertz Compton Free Electron Lasers 使用超辐射脉冲泵浦多通太赫兹康普顿自由电子激光器

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2025-09-12 DOI: 10.1134/S0021364025607778

N. S. Ginzburg, L. A. Yurovskiy, A. V. Palitsin, I. V. Zotova, Yu. Yu. Danilov, M. I. Yalandin

引用次数: 0

Light Shifts of Coherent Population Trapping Resonances in a Periodically Modulated Laser Field 周期调制激光场中相干居群捕获共振的光移

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2025-09-12 DOI: 10.1134/S0021364025606517

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

{"title":"Light Shifts of Coherent Population Trapping Resonances in a Periodically Modulated Laser Field","authors":"V. I. Yudin, M. Yu. Basalaev, A. V. Taichenachev, O. N. Prudnikov, M. D. Radchenko, V. G. Pal’chikov","doi":"10.1134/S0021364025606517","DOIUrl":"10.1134/S0021364025606517","url":null,"abstract":"The light shifts of coherent population trapping resonances in a periodically modulated laser field at the modulation frequency f varying near the fractional hyperfine splitting frequency in the ground state of atoms Δhfs/N, N = 1, 2, 3, …, have been studied by means of the Fourier analysis. This type of modulation usually takes place in a compact clocks with a semiconductor laser, when the injection current is harmonically modulated at the frequency f or when an electro-optical or acousto-optic modulator is used. In this case, a polychromatic equidistant spectrum is formed, where only two frequency components are most resonant to the working optical transitions in the atom, while all other frequency components are relatively non-resonant. The precise numerical calculations have shown that the widespread view that the shift in the coherent population trapping resonance is determined by the usual ac Stark shift of the lower atomic levels is, in general, essentially incorrect. The reason is that the additional contribution to the light shift of the coherent population trapping resonance, due to beats (at the frequency Δhfs) between different non-resonant frequency components, can be in general comparable with (or even dominant over) the standard ac Stark shift. Moreover, these beats are phase-sensitive. Therefore, even detailed information on the spectral composition of the modulated field (e.g., with the help of a spectrum analyzer) is insufficient to determine the light shift of the coherent population trapping resonance.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"122 3","pages":"144 - 151"},"PeriodicalIF":1.3,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364025606517.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037482","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 of Generation of Quantum Vortices by Waves on the Surface of Superfluid He-II 超流体He-II表面波浪产生量子涡的阈值

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2025-09-12 DOI: 10.1134/S0021364025607651

P. G. Selin, I. A. Remizov, M. R. Sultanova, E. V. Lebedeva, A. A. Levchenko, L. P. Mezhov-Deglin

引用次数: 0

Microscopic Mechanism of the Denaturation of Proteins and Nucleic Acids of Pseudomonas Aeruginosa Resonantly Absorbing 6-μm Femtosecond Laser Pulses 铜绿假单胞菌共振吸收6 μm飞秒激光脉冲蛋白和核酸变性的微观机制

IF 1.3 4区物理与天体物理

JETP Letters Pub Date : 2025-09-12 DOI: 10.1134/S002136402560747X

S. I. Kudryashov, S. N. Shelygina, V. O. Kompanets, S. V. Chekalin, I. M. Efremov, A. V. Stolyarov, E. R. Tolordava

{"title":"Microscopic Mechanism of the Denaturation of Proteins and Nucleic Acids of Pseudomonas Aeruginosa Resonantly Absorbing 6-μm Femtosecond Laser Pulses","authors":"S. I. Kudryashov, S. N. Shelygina, V. O. Kompanets, S. V. Chekalin, I. M. Efremov, A. V. Stolyarov, E. R. Tolordava","doi":"10.1134/S002136402560747X","DOIUrl":"10.1134/S002136402560747X","url":null,"abstract":"The samples of Pseudomonas aeruginosa (P. aeruginosa) plankton on an infrared-transparent silicon wafer have been studied for the first time by the method of dynamic transmission spectroscopy of 6-μm femtosecond laser pulses with a varying peak intensity within a range of (3−5) × 102 GW/cm2, which is above the threshold of ≈ 3 × 102 GW/cm2 for nondestructive inactivation of these bacteria. With an increase in the laser radiation intensity, the resonance harmonic absorption band of the C=O bond of the amide group of proteins and nucleic acids of the bacteria (at a wavenumber of 1650 cm–1) is saturated, the blueshift of the band by ( approx )200 cm–1 is then observed, and the subsequent anharmonic redshift of this band by up to 350–400 cm–1 occurs. The quantum-mechanical analysis of vibrations of structurally similar molecules in the framework of vibrational second-order perturbation theory has shown that the position of the C=O band in the case of the blueshift corresponds to vibrations in the absence of hydrogen bonds, while its significant redshift is caused by anharmonicity up to 30 cm–1 for the first vibrational quantum. Based on these data, we have suggested the molecular mechanism of the ultrafast destruction of the secondary structure of proteins and nucleic acids in the bacterium P. aeruginosa exposed to 6-μm femtosecond laser pulses through an instantaneous break of the hydrogen bond at the C=O mode during the absorption of the first infrared photon and permanent fixation of the break through high-level vibrational excitation at the threshold intensity of radiation.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"122 3","pages":"197 - 202"},"PeriodicalIF":1.3,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S002136402560747X.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037217","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