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Photovoltaic Hall Effect in Two-Dimensional Fluctuating Superconductors 二维波动超导体中的光电霍尔效应
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-12 DOI: 10.1134/S002136402460294X
M. V. Boev, V. M. Kovalev
{"title":"Photovoltaic Hall Effect in Two-Dimensional Fluctuating Superconductors","authors":"M. V. Boev,&nbsp;V. M. Kovalev","doi":"10.1134/S002136402460294X","DOIUrl":"10.1134/S002136402460294X","url":null,"abstract":"<p>The possibility of the existence of the photovoltaic Hall effect, i.e., the transverse response of a two-dimensional system with a constant driving electric field acting in the plane of the system, to circularly polarized incident radiation near the phase transition of the system to the superconducting state from the normal phase at <i>T</i> &gt; <i>T</i><sub>c</sub> is discussed. It is shown that the photovoltaic Hall effect can be caused by superconducting fluctuations in the regime where normal electrons do not contribute to this effect.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 7","pages":"494 - 498"},"PeriodicalIF":1.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S002136402460294X.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600614","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
Electron Acceleration in Nitrogen Clusters by Terawatt Femtosecond Laser 用兆瓦级飞秒激光对氮簇中的电子进行加速
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-12 DOI: 10.1134/S0021364024601957
M. M. Nazarov, T. A. Semenov, A. A. Tausenev, M. V. Chaschin, P. A. Shcheglov, A. V. Lazarev, D. A. Sidorov-Biryukov, A. V. Mitrofanov, V. M. Gordienko, V. Ya. Panchenko
{"title":"Electron Acceleration in Nitrogen Clusters by Terawatt Femtosecond Laser","authors":"M. M. Nazarov,&nbsp;T. A. Semenov,&nbsp;A. A. Tausenev,&nbsp;M. V. Chaschin,&nbsp;P. A. Shcheglov,&nbsp;A. V. Lazarev,&nbsp;D. A. Sidorov-Biryukov,&nbsp;A. V. Mitrofanov,&nbsp;V. M. Gordienko,&nbsp;V. Ya. Panchenko","doi":"10.1134/S0021364024601957","DOIUrl":"10.1134/S0021364024601957","url":null,"abstract":"<p>Narrowly divergent high-energy electron beam is experimentally demonstrated during the interaction of terawatt Ti:Sa laser radiation with a nitrogen gas-cluster jet at gas pressure corresponding to the boundary of the condensation region. A collimated electron beam with an energy of up to 10 MeV and a divergence of 10 mrad at a plasma concentration of ~10<sup>19</sup> cm<sup>–3</sup> is obtained. The use of nitrogen instead of argon or krypton significantly improves the spatial (divergence) and energy (charge and spectrum shape) properties of the generated electron beam. The formation of clusters in a supersonic jet is observed and their composition is thermodynamically analyzed.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 7","pages":"470 - 476"},"PeriodicalIF":1.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600618","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
On the Equivalence of Phase and Polarization Transformations in Quantum Optics 论量子光学中相位变换和偏振变换的等效性
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-12 DOI: 10.1134/S002136402460318X
S. N. Molotkov, I. S. Sushchev
{"title":"On the Equivalence of Phase and Polarization Transformations in Quantum Optics","authors":"S. N. Molotkov,&nbsp;I. S. Sushchev","doi":"10.1134/S002136402460318X","DOIUrl":"10.1134/S002136402460318X","url":null,"abstract":"<p>Relations have been derived to prove that field correlation functions for polarization and phase transformations of radiation states in quantum optics are equivalent in measurements.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 7","pages":"483 - 488"},"PeriodicalIF":1.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S002136402460318X.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600613","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
Alternative Idea About the Source of the Baryon Asymmetry of the Universe 关于宇宙重子不对称来源的另一种观点
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-12 DOI: 10.1134/S0021364024603312
S. N. Vergeles
{"title":"Alternative Idea About the Source of the Baryon Asymmetry of the Universe","authors":"S. N. Vergeles","doi":"10.1134/S0021364024603312","DOIUrl":"10.1134/S0021364024603312","url":null,"abstract":"<p>The paper proposes an alternative scenario for the emergence of the baryon asymmetry of the Universe. This scenario is realized in the lattice gravity model associated with the Dirac field as follows. At ultrahigh temperatures of the Grand Unification order <span>({{T}_{c}} sim {{10}^{{18}}})</span> GeV and higher, the system is in a <i>PT</i>-symmetric phase. But when the temperature decreases, a phase transition to an asymmetric phase occurs, in which a non-zero tetrad appears, that is, space-time with the Minkowski metric, and the system’s wavefunction splits into two: <span>(|,rangle = {text{|}} + rangle + ,{text{|}} - rangle )</span>. The fields of tetrads in states <span>({text{|}} + rangle )</span> and <span>({text{|}} - rangle )</span> differ in sign. At the very first moment of time with a duration of the order of the Planck time, a transition of fermions between these states is possible. These transitions in different parts of space are not correlated with each other. Therefore, the final asymmetry of the fermion charge between these states is relatively extremely small and it is preserved in time, since the interaction of the states <span>({text{|}} + rangle )</span> and <span>({text{|}} - rangle )</span> ceases at times greater than the Planck time.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 7","pages":"461 - 469"},"PeriodicalIF":1.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603312.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600617","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
Quantum Accelerometry Based on a Geometric Phase 基于几何相位的量子加速度计
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-12 DOI: 10.1134/S0021364024602471
A. M. Rostom, V. A. Tomilin, L. V. Il’ichev
{"title":"Quantum Accelerometry Based on a Geometric Phase","authors":"A. M. Rostom,&nbsp;V. A. Tomilin,&nbsp;L. V. Il’ichev","doi":"10.1134/S0021364024602471","DOIUrl":"10.1134/S0021364024602471","url":null,"abstract":"<p>A conceptual model of a promising quantum accelerometer based on a two-mode atomic Bose–Einstein condensate has been proposed. Acceleration generates a specific difference in geometric phases between the condensate modes, which shifts the interference pattern of matter waves. The modes have ring configurations, in the plane of which the measured acceleration vector lies. The homogeneity of the potentials of the ring configurations is interrupted by additional localized potentials generated by defects. Under the variation of the parameters of appropriately located defects with a certain structure, the wavefunctions of the condensate modes acquire geometric phases that differ in the presence of acceleration. Calculations performed for ring configurations of the condensate of <sup>87</sup>Rb atoms with a radius of 0.25 mm has showed that the proposed scheme can detect a microgravity of ~10<sup>–6</sup>–10<sup>–7</sup> <i>g</i>.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 7","pages":"540 - 546"},"PeriodicalIF":1.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024602471.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600616","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
Features of the Structure of Spark Channels in a Near-Cathode Region 近阴极区火花通道结构的特点
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-12 DOI: 10.1134/S0021364024602951
E. V. Parkevich
{"title":"Features of the Structure of Spark Channels in a Near-Cathode Region","authors":"E. V. Parkevich","doi":"10.1134/S0021364024602951","DOIUrl":"10.1134/S0021364024602951","url":null,"abstract":"<p>Features of the generation of a highly ionized plasma from a tip cathode after the electrical breakdown of a millimeter air discharge gap at atmospheric pressure have been studied using picosecond laser probing at a wavelength of 532 nm. It has been found that the transformation of a micron-sized cathode spot to a growing spark channel is accompanied by the formation of a spherical plasma region in the base of the spark channel in the near-cathode region. The electron density in this region, which is about 100 μm in diameter, decreases to 3 × 10<sup>19</sup> cm<sup>–3</sup> in the center and increases to (5–6) × 10<sup>19</sup> cm<sup>–3</sup> in its shell with a thickness of about 20 μm. It has been shown that the growth of the subsequent spark channel is governed by a strong ionization front formed at the boundary of the expanding spherical plasma region in 1 ns after the gap breakdown. It has been assumed that the formation of the spherical plasma region in the near-cathode region affects the subsequent development of the microstructure of the electric spark.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 7","pages":"489 - 493"},"PeriodicalIF":1.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600609","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
Synchronous Detection of Nonlinear Phenomena in Opto-Acoustic Vibrations Induced in a Nanofilm by a Femtosecond Laser Pulse 同步检测飞秒激光脉冲在纳米薄膜中诱导的光声振动中的非线性现象
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-12 DOI: 10.1134/S0021364024603208
V. A. Khokhlov, S. A. Romashevskiy, S. I. Ashitkov, N. A. Inogamov
{"title":"Synchronous Detection of Nonlinear Phenomena in Opto-Acoustic Vibrations Induced in a Nanofilm by a Femtosecond Laser Pulse","authors":"V. A. Khokhlov,&nbsp;S. A. Romashevskiy,&nbsp;S. I. Ashitkov,&nbsp;N. A. Inogamov","doi":"10.1134/S0021364024603208","DOIUrl":"10.1134/S0021364024603208","url":null,"abstract":"<p>Studies of the laser-induced ultrafast processes in thin films are of significant importance for the development of microelectronics. These processes include the heating of an electron subsystem, relaxation and transport of the absorbed energy, and generation and propagation of picosecond acoustic waves. In view of this circumstance, to study the dynamics of variation of the differential reflection coefficient Δ<i>R</i>(<i>t</i>)/<i>R</i><sub>0</sub> of a 73-nm-thick Ni film on a glass substrate, pump–probe measurements have been performed in this work with the synchronous detection of a Δ<i>R</i>(<i>t</i>)/<i>R</i><sub>0</sub> signal. High absorbed fluences up to 11 mJ/cm<sup>2</sup> have been reached by increasing the pulse-repetition interval <i>t</i><sub>cool</sub> of heating (pump) pulses. An increase in <i>t</i><sub>cool</sub> makes it possible to better cool the film after heating. As a result, record temperatures <i>T</i><sub><i>e</i></sub> ≈ 3 kK and <i>T</i><sub><i>i</i></sub> ≈ 1 kK and stresses up to 7 GPa have been reached for the first time to the best of our knowledge. These high values have allowed the observation of nonlinear effects for the first time in experiments with synchronous detection.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 7","pages":"531 - 539"},"PeriodicalIF":1.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600615","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
Quantum Effects at a Spin-Flop Transition in the Antiferromagnetic Topological Insulator MnBi2Te4 反铁磁拓扑绝缘体 MnBi2Te4 中自旋-翻转转变的量子效应
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-12 DOI: 10.1134/S0021364024603002
V. V. Val’kov, A. O. Zlotnikov, A. Gamov, N. A. Fedorova, F. N. Tomilin
{"title":"Quantum Effects at a Spin-Flop Transition in the Antiferromagnetic Topological Insulator MnBi2Te4","authors":"V. V. Val’kov,&nbsp;A. O. Zlotnikov,&nbsp;A. Gamov,&nbsp;N. A. Fedorova,&nbsp;F. N. Tomilin","doi":"10.1134/S0021364024603002","DOIUrl":"10.1134/S0021364024603002","url":null,"abstract":"<p>It is shown that the experimentally detected features in the low-temperature behavior of the magnetization in an external magnetic field perpendicular to the layers of manganese ions of the topological antiferromagnet MnBi<sub>2</sub>Te<sub>4</sub> are due to quantum effects induced by the off-diagonal nature of the trigonal component of the crystal field. In this case, the anomalous increase in the magnetization of the material before the spin-flop transition, as well as after it in the phase of “collapsed” sublattices, is explained by the suppression of contributions from quantum effects. The comparison of the results of the theoretical analysis with experimental data has made it possible to refine the parameters of the effective spin model of MnBi<sub>2</sub>Te<sub>4</sub> and to establish the important role of the noted trigonal component.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 7","pages":"499 - 508"},"PeriodicalIF":1.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603002.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600621","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
Generalized Bloch Theorem and Band-Structure Topology 广义布洛赫定理和带状结构拓扑学
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602574
Yu. B. Kudasov
{"title":"Generalized Bloch Theorem and Band-Structure Topology","authors":"Yu. B. Kudasov","doi":"10.1134/S0021364024602574","DOIUrl":"10.1134/S0021364024602574","url":null,"abstract":"<p>Dispersion relations in a metal with a commensurate helical magnetic order are considered in the framework of one- and two-dimensional tight-binding models. The generalized Bloch theorem for translations combined with spin rotations, together with the Born–Karman periodic boundary conditions, leads to the appearance of multisheet dispersion curves (surfaces). It is demonstrated that the resulting band structure is topologically nontrivial, which can lead to a spin textured Fermi surface and cause transport anomalies.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"416 - 420"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024602574.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565788","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
Erratum to: Direct Observation of Pinning of Abrikosov Vortices in a Specially Inhomogenious Crystal EuRbFe4As4 勘误：直接观测特殊非均质晶体 EuRbFe4As4 中的阿布里科索夫涡旋钉扎现象
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024010016
M. S. Sidelnikov, A. V. Palnichenko, K. S. Pervakov, V. A. Vlasenko, I. I. Zverkova, L. S. Uspenskaya, V. M. Pudalov, L. Ya. Vinnikov
{"title":"Erratum to: Direct Observation of Pinning of Abrikosov Vortices in a Specially Inhomogenious Crystal EuRbFe4As4","authors":"M. S. Sidelnikov,&nbsp;A. V. Palnichenko,&nbsp;K. S. Pervakov,&nbsp;V. A. Vlasenko,&nbsp;I. I. Zverkova,&nbsp;L. S. Uspenskaya,&nbsp;V. M. Pudalov,&nbsp;L. Ya. Vinnikov","doi":"10.1134/S0021364024010016","DOIUrl":"10.1134/S0021364024010016","url":null,"abstract":"","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"460 - 460"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024010016.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565715","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
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