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Effect of the Deformation on the Conductivity of the Quasi-One-Dimensional Conductor K0.3MoO3 in the Peierls State
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-03-25 DOI: 10.1134/S002136402460513X
S. G. Zybtsev, V. Ya. Pokrovskii, S. V. Zaitsev-Zotov
{"title":"Effect of the Deformation on the Conductivity of the Quasi-One-Dimensional Conductor K0.3MoO3 in the Peierls State","authors":"S. G. Zybtsev,&nbsp;V. Ya. Pokrovskii,&nbsp;S. V. Zaitsev-Zotov","doi":"10.1134/S002136402460513X","DOIUrl":"10.1134/S002136402460513X","url":null,"abstract":"<p>The conductivity σ of the quasi-one-dimensional conductor K<sub>0.3</sub>MoO<sub>3</sub> in low fields has been studied as a function of the temperature and uniaxial strain ε. It has been found that the Peierls transition temperature decreases under tensile strain and increases under compressive strain. A hysteresis is observed on the dependences σ(ε) for the Peierls state. The dependences indicate a strain-induced change in the wave vector of a charge density wave. This result seems to contradict the absence of a decrease in Young’s modulus in K<sub>0.3</sub>MoO<sub>3</sub> at the depinning of the charge density wave. It has been shown that this contradiction is resolved by taking into account the transverse components in the deformation of the charge density wave and the lattice and the three-dimensional nature of their interaction.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 3","pages":"189 - 194"},"PeriodicalIF":1.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698613","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
Determination of the Character of the Interaction of Bioactive Ions with Phospholipid Membranes Using Nonlinear Microscopy Methods 利用非线性显微镜方法确定生物活性离子与磷脂膜相互作用的特性
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-03-25 DOI: 10.1134/S0021364024605098
M. Yu. Eremchev, A. V. Naumov
{"title":"Determination of the Character of the Interaction of Bioactive Ions with Phospholipid Membranes Using Nonlinear Microscopy Methods","authors":"M. Yu. Eremchev,&nbsp;A. V. Naumov","doi":"10.1134/S0021364024605098","DOIUrl":"10.1134/S0021364024605098","url":null,"abstract":"<p>The study of electrostatic and chemical interactions and transformations on the surface of lipid membranes is crucial for estimating the efficiency and toxicity of different drugs, as well as the mechanisms for their delivery. The description of these interactions at a molecular level requires the use of highly sensitive non-invasive methods. This work presents the experimental results demonstrating the capability of second harmonic generation microscopy to study electrochemical processes affecting the structure of a narrow (&lt;1 nm) hydration layer of model cell membranes. On the example of bioactive potassium and calcium ions of different concentrations, a unique sensitivity of this method to a change in the surface potential of membranes has been demonstrated. An increase in the ionic strength of the solution above 15 mM in the case of calcium ions leads to a complete neutralization of the membrane surface, while potassium ions only partially screen the surface charge of a membrane. It has been shown that a change in the structure and composition of membranes leads to the emergence of steric effects in the interaction of head groups of lipids with water molecules in the hydration layer.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 3","pages":"225 - 230"},"PeriodicalIF":1.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024605098.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698616","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
Spectroscopic Study of the Multiferroic LiCoPO4: Magnetostructural Phase Transition
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-03-25 DOI: 10.1134/S0021364024604603
S. A. Klimin, A. D. Molchanova, V. A. Chernyshev, V. N. Denisov, N. N. Novikova, V. A. Yakovlev
{"title":"Spectroscopic Study of the Multiferroic LiCoPO4: Magnetostructural Phase Transition","authors":"S. A. Klimin,&nbsp;A. D. Molchanova,&nbsp;V. A. Chernyshev,&nbsp;V. N. Denisov,&nbsp;N. N. Novikova,&nbsp;V. A. Yakovlev","doi":"10.1134/S0021364024604603","DOIUrl":"10.1134/S0021364024604603","url":null,"abstract":"<p>The low-frequency excitations of the LiCoPO<sub>4</sub> multiferroic have been studied. New lines of various origins have been observed in the transmission spectra below the temperature of antiferromagnetic ordering, which is accompanied by the appearance of spontaneous electric polarization. Most of these lines correspond to magnetic excitations. The appearance of new phonons in the antiferromagnetic state has been detected for the first time, which makes it possible to classify the phase transition as a magnetostructural phase transition. Information on the frequencies of infrared-active <i>B</i><sub>1<i>u</i></sub> and <i>B</i><sub>2<i>u</i></sub> modes of LiCoPO<sub>4</sub> has been obtained for the first time. These data are in good agreement with the ab initio calculations.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 3","pages":"182 - 188"},"PeriodicalIF":1.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024604603.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698612","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
Spectral Properties of an Anodic Alumina Photonic Crystal with a Variable Period 周期可变的阳极氧化铝光子晶体的光谱特性
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-03-25 DOI: 10.1134/S0021364024604706
M. V. Pyatnov, I. R. Volkova, D. S. Buzin, S. Ya. Vetrov, M. N. Volochaev, I. I. Ryzhkov, I. V. Timofeev
{"title":"Spectral Properties of an Anodic Alumina Photonic Crystal with a Variable Period","authors":"M. V. Pyatnov,&nbsp;I. R. Volkova,&nbsp;D. S. Buzin,&nbsp;S. Ya. Vetrov,&nbsp;M. N. Volochaev,&nbsp;I. I. Ryzhkov,&nbsp;I. V. Timofeev","doi":"10.1134/S0021364024604706","DOIUrl":"10.1134/S0021364024604706","url":null,"abstract":"<p>A one-dimensional photonic crystal with a variable period has been fabricated from porous anodic alumina. A stepwise increase in the period has ensured the broadening of the photonic bandgap from 50 to 170 nm. It has been shown that the introduction of water, alcohol, or acetone into the pores of the crystal allows one to modify the transmission spectrum and to split the passband. It is shown that the combination of angular incidence of light with pore filling makes it possible to use the fabricated crystal as a broad- and narrowband reusable filter.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 3","pages":"166 - 169"},"PeriodicalIF":1.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024604706.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698600","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
EPR-Revealed New Highly Symmetric Radiation-Induced Structural Defect in Diamond
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-03-25 DOI: 10.1134/S0021364024604937
S. V. Vyatkin, V. G. Vins, P. A. Danilov, S. I. Kudryashov
{"title":"EPR-Revealed New Highly Symmetric Radiation-Induced Structural Defect in Diamond","authors":"S. V. Vyatkin,&nbsp;V. G. Vins,&nbsp;P. A. Danilov,&nbsp;S. I. Kudryashov","doi":"10.1134/S0021364024604937","DOIUrl":"10.1134/S0021364024604937","url":null,"abstract":"<p>A structural center formed in Ib-type synthetic diamond after irradiation with 3 MeV electrons and annealing at 1200°C for 30 min has been studied initially using electron paramagnetic resonance. It is similar to the R5–R12 paramagnetic centers in the conditions of the formation and characteristics, but unlike them, the studied center is more symmetric: having the same spin <span>(S = 1)</span>, it has an almost isotropic (within the experimental and simulation accuracy) <span>(g)</span>-factor <span>(g = 2.018(2))</span>, significant zero-field splitting <span>(D = 2886(9){kern 1pt} )</span> MHz, and 〈111〉 (<span>({{C}_{{3{v}}}})</span>) symmetry. This center may be considered as a striking example of the tendency of structural centers in diamond to increase their local symmetry with the energy and, in particular, with the temperature of subsequent annealing.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 3","pages":"202 - 204"},"PeriodicalIF":1.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698611","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
Features of Radiation Heating Kinetics of Metal Plates under Fluctuation-Electromagnetic Friction
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-03-05 DOI: 10.1134/S0021364024604871
G. V. Dedkov
{"title":"Features of Radiation Heating Kinetics of Metal Plates under Fluctuation-Electromagnetic Friction","authors":"G. V. Dedkov","doi":"10.1134/S0021364024604871","DOIUrl":"10.1134/S0021364024604871","url":null,"abstract":"<p>The radiative heat exchange between two thick homogeneous isotropic plates undergoing relative nonrelativistic lateral motion is studied. Particular attention is paid to the symmetry properties of a system with the same or different parameters. It is shown that one of the gold plates (moving or stationary) in the quasi-stationary regime can be much more overheated than the other. These features can be used to experimentally study the Casimir–Lifshitz forces.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 2","pages":"154 - 158"},"PeriodicalIF":1.4,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553862","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
Record Increase in the Curie Temperature up to Room Values in the Noncentrosymmetric Magnet Mn1 – xRhxSi
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-03-05 DOI: 10.1134/S0021364024604482
S. V. Demishev, V. N. Krasnorussky, A. E. Os’kin, A. V. Bokov, I. P. Zibrov, D. A. Salamatin, A. V. Semeno, V. A. Sidorov, P. V. Enkovich, V. V. Brazhkin, A. V. Tsvyashchenko
{"title":"Record Increase in the Curie Temperature up to Room Values in the Noncentrosymmetric Magnet Mn1 – xRhxSi","authors":"S. V. Demishev,&nbsp;V. N. Krasnorussky,&nbsp;A. E. Os’kin,&nbsp;A. V. Bokov,&nbsp;I. P. Zibrov,&nbsp;D. A. Salamatin,&nbsp;A. V. Semeno,&nbsp;V. A. Sidorov,&nbsp;P. V. Enkovich,&nbsp;V. V. Brazhkin,&nbsp;A. V. Tsvyashchenko","doi":"10.1134/S0021364024604482","DOIUrl":"10.1134/S0021364024604482","url":null,"abstract":"<p>The magnetic properties of Mn<sub>1–<i>x</i></sub>Rh<sub><i>x</i></sub>Si solid solutions with a noncentrosymmetric structure B20 synthesized at a pressure of 8 GPa and temperatures of 1500–1770 K have been studied in detail in a wide temperature range of 2–300 K in magnetic fields up to 9 T. An anomalous increase in the Curie temperature <i>T</i><sub>C</sub> of compounds with 0.15 ≤ <i>x</i> ≤ 0.8 by a factor of 8.4–11.5 compared to the pure helical magnet MnSi has been found. It has been established that the Curie temperature <i>T</i><sub>C</sub> increases with the rhodium content to <i>T</i><sub>C</sub>(<i>x</i> = 0.15) = (244 ± 4) K, <i>T</i><sub>C</sub>(<i>x</i> = 0.4) = (299 ± 5) K, and <i>T</i><sub>C</sub>(<i>x</i> = 0.8) = (334 ± 6) K. Uniquely high magnetic transition temperatures up to room values occur in the disordered ferromagnetic Griffiths phase and may be due to the spin-fluctuation mechanism of enhancement of the magnetic interaction.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 2","pages":"111 - 118"},"PeriodicalIF":1.4,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024604482.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554098","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
Mass of Magnetic Monopoles and the Magnetic Susceptibility of Spin Ice
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-03-05 DOI: 10.1134/S0021364024605104
M. I. Ryzhkin, I. A. Ryzhkin
{"title":"Mass of Magnetic Monopoles and the Magnetic Susceptibility of Spin Ice","authors":"M. I. Ryzhkin,&nbsp;I. A. Ryzhkin","doi":"10.1134/S0021364024605104","DOIUrl":"10.1134/S0021364024605104","url":null,"abstract":"<p>The effect of the finite mass of magnetic monopoles on the time and spatial dispersion of the magnetic susceptibility of spin ice is investigated. It is shown that the frequency dependence of the susceptibility in the low-frequency range follows the Debye law, while the susceptibility in the high-frequency range decreases more rapidly with an increase in the frequency. As a result, the sum rule violation typical of the Debye law is removed. The possibility of collective excitations, which are analogous to plasmons in systems with an electric charge, in a magnetic monopole system at high frequencies is also considered.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 2","pages":"126 - 131"},"PeriodicalIF":1.4,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024605104.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553792","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
Ice-Like Structure of the Hydrate Shell of Quartz Nanoparticles in an Aqueous Suspension
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-03-05 DOI: 10.1134/S0021364024604378
S. M. Pershin, A. F. Bunkin, M. A. Davydov, A. N. Fedorov, M. Ya. Grishin
{"title":"Ice-Like Structure of the Hydrate Shell of Quartz Nanoparticles in an Aqueous Suspension","authors":"S. M. Pershin,&nbsp;A. F. Bunkin,&nbsp;M. A. Davydov,&nbsp;A. N. Fedorov,&nbsp;M. Ya. Grishin","doi":"10.1134/S0021364024604378","DOIUrl":"10.1134/S0021364024604378","url":null,"abstract":"<p>Spectroscopy experiments of the inelastic scattering of laser pulses in an aqueous suspension of silicon dioxide (SiO<sub>2</sub>) nanoparticles at room temperature have revealed for the first time that the centroid of the OH Raman scattering band is shifted to the pump line up to 10 cm<sup>–1</sup> and two components of stimulated backward and forward Brillouin scattering with frequency shifts of ~7.5 and ~14.3 GHz are simultaneously generated. The frequency shift 7.5 GHz corresponds to the Stokes component of Brillouin scattering in water (speed of sound of ~1490 m/s), while the 14.3 GHz shift component corresponds to the speed of sound of ~2900 m/s; i.e., this component falls within the range of speeds of sound in ice at room temperature. In our opinion, the results of these experiments indicate both the formation of hydrate layers with an ice-like hydrogen bonding structure around SiO<sub>2</sub> nanoparticles and a decrease in the volumetric thermal expansion coefficient of the aqueous suspension.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 2","pages":"84 - 88"},"PeriodicalIF":1.4,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024604378.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554071","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
Control of the Topology of Magnetic Structures in a Perforated Film by an Electric Field
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-03-05 DOI: 10.1134/S002136402460410X
E. B. Magadeev, R. M. Vakhitov
{"title":"Control of the Topology of Magnetic Structures in a Perforated Film by an Electric Field","authors":"E. B. Magadeev,&nbsp;R. M. Vakhitov","doi":"10.1134/S002136402460410X","DOIUrl":"10.1134/S002136402460410X","url":null,"abstract":"<p>A perforated plane ferromagnetic film with the inhomogeneous magnetoelectric interaction is theoretically studied. It is shown that an applied electric field can change the topology of the magnetic structure in such a film. Moreover, it is demonstrated that the distribution of the electric potential ensuring the occurrence of an arbitrary predetermined topology of the magnetic structure can be found. Explicit expressions determining the topology of the magnetic structure at the potential distribution are presented for the general and some particular cases.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 2","pages":"89 - 94"},"PeriodicalIF":1.4,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S002136402460410X.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554072","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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