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Photonics of Two-Dimensional Structures Formed by Cholesteric Liquid Crystals 胆甾液晶形成二维结构的光子学
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-08 DOI: 10.1134/S0021364024603919
P. V. Dolganov, K. D. Baklanova, V. K. Dolganov, E. I. Kats
{"title":"Photonics of Two-Dimensional Structures Formed by Cholesteric Liquid Crystals","authors":"P. V. Dolganov,&nbsp;K. D. Baklanova,&nbsp;V. K. Dolganov,&nbsp;E. I. Kats","doi":"10.1134/S0021364024603919","DOIUrl":"10.1134/S0021364024603919","url":null,"abstract":"<p>Chiral liquid crystal materials can self-organize into modulated structures with multilevel arrangement formed by curved cholesteric helixes and spatially ordered defects. We managed to prepare periodic two-dimensional cholesteric domains with remarkable structure and photonic properties. They are formed due to geometrical frustration. Complex optical patterns with non-trivial dependence of the images on light polarization and on observation geometry were found and investigated in transmission and reflection. The obtained photonic structures of two-dimensional ordered confocal domains and their optical properties are a challenge both for theory and experiment.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 10","pages":"772 - 778"},"PeriodicalIF":1.4,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941029","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
De Haas–van Alphen Effect and a Giant Temperature Peak in the Heavy Fermion SmB6 Compound 重费米子SmB6化合物中的De Haas-van Alphen效应和巨大温度峰
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-08 DOI: 10.1134/S0021364024603968
V. A. Zyuzin
{"title":"De Haas–van Alphen Effect and a Giant Temperature Peak in the Heavy Fermion SmB6 Compound","authors":"V. A. Zyuzin","doi":"10.1134/S0021364024603968","DOIUrl":"10.1134/S0021364024603968","url":null,"abstract":"<p>In this paper we suggest a possible explanation of the giant temperature peak in the amplitude of the de Haas–van Alphen oscillations observed at very low temperatures in insulating SmB<sub>6</sub> system. Our theoretical model consists of two fermions with particle-like dispersion but with different masses, one much heavier than the other, which hybridize with each other to open up a gap at their degeneracy point. As a result of the hybridization a heavy-fermion hybrid appears at the Fermi level. Our results strongly suggest that it is exactly this heavy-fermion hybrid which results in the giant temperature peak. In addition we propose a scenario when this hybrid has edge states.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 10","pages":"766 - 771"},"PeriodicalIF":1.4,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603968.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941004","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
Electron Transport in Photocathodes as a Response to a Laser Pulse Inducing the Photoelectric Effect 光电阴极中的电子传输对诱发光电效应的激光脉冲的响应
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024601878
M. V. Vladimirov, S. M. Polozov, V. I. Rashchikov
{"title":"Electron Transport in Photocathodes as a Response to a Laser Pulse Inducing the Photoelectric Effect","authors":"M. V. Vladimirov,&nbsp;S. M. Polozov,&nbsp;V. I. Rashchikov","doi":"10.1134/S0021364024601878","DOIUrl":"10.1134/S0021364024601878","url":null,"abstract":"<p>An analytical model has been developed to describe the electron transport in semiconductor photocathodes exposed to microwave radiation from radiofrequency photoguns. The considered model, whose applicability framework is presented, makes it possible to obtain an analytical expression for the photocurrent profile, which potentially allows a more accurate simulation of the operation regime of radiofrequency photoguns for generating ultrashort (pico- and subpicosecond) electron bunches. The dependence of photocurrent fronts on the model parameters has been considered and discussed. The main directions for the development of the model have been outlined.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"428 - 433"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565790","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
Gravitational Field of a Self-Gravitating Continuous Medium and Dark Matter 自引力连续介质和暗物质的引力场
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602239
V. M. Zhuravlev
{"title":"Gravitational Field of a Self-Gravitating Continuous Medium and Dark Matter","authors":"V. M. Zhuravlev","doi":"10.1134/S0021364024602239","DOIUrl":"10.1134/S0021364024602239","url":null,"abstract":"<p>A method to describe the hidden mass effect or dark matter has been proposed on the basis of a new general solution of the Poisson equation for the gravitational field strength in a continuous self-gravitating medium. This solution is a consequence of the theory of space and matter alternative to the general relativity. Conditions have been derived to distinguish between the cases where the obtained solution describes the classical Newtonian gravitational field and the cases where this solution leads to the hidden mass effect. The representation obtained for the gravitational field strength has been analyzed within the model of the dynamic equilibrium of disk galaxies and the possibility of describing the observed properties of the hidden mass effect within this approach has been discussed.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"388 - 395"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024602239.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565787","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
Subterahertz Response of Planar Phospholipid Membranes in Inelastic Light Scattering 平面磷脂膜在非弹性光散射中的次赫兹响应
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602756
S. V. Adichtchev, E. A. Dobrynina, N. V. Surovtsev
{"title":"Subterahertz Response of Planar Phospholipid Membranes in Inelastic Light Scattering","authors":"S. V. Adichtchev,&nbsp;E. A. Dobrynina,&nbsp;N. V. Surovtsev","doi":"10.1134/S0021364024602756","DOIUrl":"10.1134/S0021364024602756","url":null,"abstract":"<p>Using a method of low frequency Raman scattering, hydrated planar samples of phospholipid bilayers are studied at room temperature. It has been demonstrated that a relaxation response, the spectral shape of which corresponds to a wide distribution of relaxation times in the picosecond range, is manifested in the subterahertz range. The spectral susceptibility of the relaxation response is described by a power function with an exponent of 0.25, is the same for gel and fluid phases of phospholipid bilayers, and does not depend on the degree of saturation of hydrocarbon tails of different phospholipids. The subterahertz relaxation response can be considered as an elementary relaxation event, which precedes slower relaxation processes such as lateral diffusion and changes in the thickness or curvature of a phospholipid bilayer.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"455 - 459"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565714","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
Magnon Supercurrent and the Phase Slippage in an Yttrium Iron Garnet Film 钇铁石榴石薄膜中的磁子超电流和相滑移
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024603117
Yu. M. Bunkov, V. I. Belotelov, P. M. Vetoshko, G. A. Knyazev, A. N. Kuzmichev, P. E. Petrov
{"title":"Magnon Supercurrent and the Phase Slippage in an Yttrium Iron Garnet Film","authors":"Yu. M. Bunkov,&nbsp;V. I. Belotelov,&nbsp;P. M. Vetoshko,&nbsp;G. A. Knyazev,&nbsp;A. N. Kuzmichev,&nbsp;P. E. Petrov","doi":"10.1134/S0021364024603117","DOIUrl":"10.1134/S0021364024603117","url":null,"abstract":"<p>Exactly forty years ago, the spin superfluidity and Bose–Einstein condensation of magnons in superfluid antiferromagnetic <sup>3</sup>He-B were discovered. In this work, the existence of spin superfluidity and phase slippage in an yttrium iron garnet film at room temperature is demonstrated using the optical Faraday effect. The s-patial distribution of the phase and amplitude of the spin precession under the conditions of magnon Bose‒Einstein condensation are studied by varying the pump phase difference between two strip lines exciting magnons.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"421 - 427"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603117.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565789","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
Measurement of the Cross Section for the Neutron-Induced Fission of 237Np Nuclei in the Energy Range of 0.3–500 MeV 测量能量范围为 0.3-500 兆电子伏的 237Np 核的中子诱发裂变截面
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602987
A. S. Vorobyev, A. M. Gagarski, O. A. Shcherbakov, L. A. Vaishnene, A. M. Tyagelskaya, N. M. Olkhovich, A. L. Barabanov
{"title":"Measurement of the Cross Section for the Neutron-Induced Fission of 237Np Nuclei in the Energy Range of 0.3–500 MeV","authors":"A. S. Vorobyev,&nbsp;A. M. Gagarski,&nbsp;O. A. Shcherbakov,&nbsp;L. A. Vaishnene,&nbsp;A. M. Tyagelskaya,&nbsp;N. M. Olkhovich,&nbsp;A. L. Barabanov","doi":"10.1134/S0021364024602987","DOIUrl":"10.1134/S0021364024602987","url":null,"abstract":"<p>The cross section for the neutron-induced fission of <sup>237</sup>Np nuclei in the neutron energy range of 0.3–500 MeV has been measured using the time-of-flight spectrometer of the GNEIS neutron complex at the Petersburg Nuclear Physics Institute, National Research Center Kurchatov Institute. The <sup>237</sup>Np(<i>n</i>, <i>f</i>) fission cross section has been measured with respect to the <sup>235</sup>U(<i>n</i>, <i>f</i>) fission cross section and fission fragments have been detected by low-pressure position-sensitive multiwire proportional counters. The data obtained have been compared to the previous experimental results and to estimates from various evaluated data libraries.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"373 - 380"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024602987.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565829","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
On Flexoelectricity in a Multidomain Ferroelectric 多域铁电中的柔电性
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602847
A. S. Yurkov, P. V. Yudin
{"title":"On Flexoelectricity in a Multidomain Ferroelectric","authors":"A. S. Yurkov,&nbsp;P. V. Yudin","doi":"10.1134/S0021364024602847","DOIUrl":"10.1134/S0021364024602847","url":null,"abstract":"<p>Flexoelectricity in a macroscopically unpolarized multidomain ferroelectric is considered. It has been shown that the flexoelectric moduli are modified due to the piezoelectric effect in individual domains. The perturbation theory has been developed, where the effect appears in the third order. The estimate of the effect for lead titanate in the isotropic approximation has shown that corrections to the flexoelectric moduli <i>f</i><sub>1111</sub> and <i>f</i><sub>1122</sub> are comparable with their initial values and depend only on the initial value of <i>f</i><sub>1212</sub>. The correction to <i>f</i><sub>1212</sub> is small, which allows one to use the perturbation theory.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"411 - 415"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565713","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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