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Excitation of spin waves edge modes in chains of ferromagnetic pillars
Journal of Physics: Conference Series. 2019. Vol. 1410. No. 1. Article 012189.
Osokin S., Sharaevskaya A., Safin A., Kalyabin D.
We report on studies of spin waves properties in finite waveguides, formed by discrete arrays of ferromagnetic pillars. Dispersion characteristics of spin waves in such structures can be altered by changing the magnetization configurations of chain of pillars, thus creating the conditions for the bulk and edge modes to exist. Using theoretical and numerical methods we study the frequencies and spatial distributions of different spin waves modes formed by the presence of the boundaries and shape anisotropies of the waveguide.We report on studies of spin waves properties in finite waveguides, formed by discrete arrays of ferromagnetic pillars. Dispersion characteristics of spin waves in such structures can be altered by changing the magnetization configurations of chain of pillars, thus creating the conditions for the bulk and edge modes to exist. Using theoretical and numerical methods we study the frequencies and spatial distributions of different spin waves modes formed by the presence of the boundaries and shape anisotropies of the waveguide.
Vergeles S. S., Vointsev I., Physics of Fluids 2026 Vol. 38 P. 024117-1–024117-8
We analytically consider the problem of the Langmuir instability. The instability describes emergence of transverse modulation of horizontal current with vertical shear, when it is superimposed on surface wave co-directional with the flow. Compared to the Craik–Leibovich scheme, we account for the scattering of surface wave on the modulated current, which is significant if the ...
Added: September 26, 2026
Frolov N. Y., Klokov A. Y., Sharkov A. I. et al., Applied Physics Letters 2026 Vol. 128 P. 092201-1–092201-5
Understanding the properties of two-dimensional material interfaces with the substrate is necessary for device applications. Surface acoustic wave propagation through a layered material flake on a substrate could provide unique information on the transverse rigidity of the flake-to-substrate interaction. Ultrasonic waves were generated by a focused femtosecond laser pulse at the surface of a model ...
Added: September 26, 2026
Войтович В. И., Makhov I., Мельниченко И. А. et al., Optics Letters 2026 Vol. 51 No. 17 P. 4872–4875
The influence of cavity surface passivation with SiO2 coating deposited by the plasma-enhanced chemical vapor deposition technique is investigated for injection microdisk lasers with an InGaAsN/GaAs quantum well active region. The electroluminescence spectra of the microdisk lasers with cavity diameters ranging from 12 to 32 μm with and without sidewall surface passivation were studied for a ...
Added: September 25, 2026
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Оптика и спектроскопия 2026 Т. 134 № 3 С. 272–277
Представлены результаты по реализации генерации при повышенных температурах в лазерах с длиной волны генерации 980 nm на основе вертикального микрорезонатора с использованием непоглощающих на длине волны оптической накачки зеркал. Минимальная пороговая мощность накачки составила ~0.8 mW и соответствовала температуре 150 K. Добротность микрорезонатора, определенная на пороге генерации, превысила 13000. Максимальная рабочая температура микролазера составила 195 ...
Added: September 25, 2026
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Письма в Журнал технической физики 2026 Т. 52 № 12 С. 40–43
Реализована одночастотная генерация при 300 K в лазерах на основе вертикального микрорезонатора. Для лазеров с полупроводниковым выводным зеркалом пороговая плотность мощности накачки составила 6.5 kW/cm2. Добротность микрорезонатора и длина волны излучения, определенные на пороге генерации, равнялись 8800 и ~ 959.8 nm. Применение конструкции микрорезонатора с гибридным выводным зеркалом позволило повысить добротность микрорезонатора (до 12 360) ...
Added: September 25, 2026
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Письма в Журнал технической физики 2026 Т. 52 № 18 С. 30–34
Представлены результаты реализации генерации при комнатной температуре в планарных вертикальных микрорезонаторах на основе зеркал Al0.2Ga0.8As/Al0.9Ga0.1As. При 300 K пороговая плотность мощности и добротность на пороге генерации составили 11.4± 0.7 kW/cm2 и 5070± 160 соответственно. Двукратное превышение порога генерации привело к увеличению добротности микрорезонатора до 19 000. Эффективный латеральный теплоотвод подтвержден малым сдвигом энергии кванта, который составил ...
Added: September 25, 2026
Budkov Y., Kiselev M. G., Journal of Chemical Physics 2026 Vol. 165 No. 12 Article 124508
We develop a three-mode statistical-mechanical theory for a two-conformer
solute in a near-critical solvent. A compressible lattice model with
vacancies yields the Gaussian free-energy functional for a critical conserved
density, an orthogonal noncritical conserved mode, and the local conformer
fraction. Their couplings follow from packing and cohesive interactions,
rather than being introduced phenomenologically. Kawasaki transport of the
two conserved fields and ...
Added: September 24, 2026
Kryzhanovskaya N., Makhov I., Dragunova A., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2026 Vol. 19 No. 1.1 P. 98–104
The planar microcavity structure was grown using molecular-beam epitaxy.
Single-mode lasing was observed at a wavelength of 960 nm for pillars with a diameter of
15 μm. At 300 K, the lasing threshold was approximately 30 mW. Increasing the pump
power to 2.7 times the threshold power resulted in a mode energy shift of approximately
1 meV. This shift ...
Added: September 23, 2026
Andreeva S., Gavrilov A. A., Dzhikirba K. R. et al., Physical Review B: Condensed Matter and Materials Physics 2026 Vol. 114 Article 134515
We examine plasma excitations with linear dispersion in a system of superconducting electrons in thin
NbN disks. Using frequency-domain terahertz spectroscopy, we study the evolution of plasmons up to critical
temperature Tc. The observed excitations tend to shift to the lower frequencies while temperature is increasing
and the spectral features vanish at T > Tc. We study the ...
Added: September 23, 2026
Образцова А. А., Ivanov K., Moiseev E. et al., Journal of Physics D: Applied Physics 2026 Vol. 59 No. 30 P. 305103
We demonstrate a thermo-optically tunable microlaser based on an InGaAs/GaAs quantum-dot (QD) active region employing a deformed limaçon-shaped cavity. The asymmetric geometry effectively lifts the degeneracy of high-Q whispering-gallery modes, enabling single-mode lasing. A side-mode suppression ratio exceeds 25 dB over a wide current range. Under continuous-wave electrical pumping, the device achieves a peak output power ...
Added: September 23, 2026
Budkov Y., Journal of Chemical Physics 2026 Vol. 165 No. 12 Article 124105
Exact theories of electrolyte structure must satisfy the nonlocal constraints imposed by electrostatic screening, yet these constraints are most commonly formulated only for homogeneous bulk systems and at the level of two-point correlations. Here, we develop a unified field-theoretic framework that extends them to general inhomogeneous ionic fluids and nonlinear charge correlations. Using a standard ...
Added: September 22, 2026
Боровицкая И. В., Пименов В. Н., Коршунов С. Н. et al., Перспективные материалы 2026 № 10 С. 37–54
Проведено сравнение, обобщение и систематизация механизмов эрозии и разрушения
поверхности малоактивируемых материалов, перспективных для использования в
качестве материалов вакуумной камеры термоядерных реакторов: ванадия, его сплава
V – 10 Ti – 6 Cr – 0,05 Zr – 0,1 Si и вольфрама при последовательном воздействии на
них ионных и тепловых потоков. Тепловые потоки имитировали с помощью мощного
импульсного лазерного излучения (ЛИ), создаваемого ...
Added: September 22, 2026
Iontsev M.A., Mukhin S. I., Fistul M. V., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 94 No. 17 P. 174–510
We report a theoretical study of the ac response of superconducting quantum metamaterials (SQMs), i.e., an array of qubits (two-level systems) embedded in a low-dissipative resonator. By making use of a particular example of a SQM, namely the array of charge qubits capacitively coupled to the resonator, we obtain a second-order phase transition between an ...
Added: September 22, 2026
Shilov A. L., Elesin L., Kravtsov M. et al., Nature Communications 2026 Vol. 17 No. 1 Article 9734
Identifying the microscopic processes limiting conductivity is essential for understanding correlated quantum materials. In twisted bilayer graphene, metallic resistivity follows ρ ~ Tα with widely varying α, fueling competing interpretations from phonon-limited transport and umklapp scattering to strange metallicity and heavy-fermion renormalization. Here, we use terahertz excitation to selectively heat electrons while keeping the lattice cold, separating ...
Added: September 20, 2026
Kalyabin D., Demidov V., Никитов С. А., Физика металлов и металловедение 2025 Т. 126 № 11 С. 1220–1225
Исследован спиновый транспорт в антиферромагнитных проводниках. Спиновый ток инжектировали из ферромагнитной пленки Co в антиферромагнитный проводник FeMn, после чего было исследовано постоянное напряжение, возникающее в слое Pt в условиях ферромагнитного резонанса при различных углах поворота ориентации постоянного магнитного поля в плоскости пленки. Был рассчитан вклад, вызванный чистым спиновым током (спиновой накачкой), зарегистрированный с помощью обратного ...
Added: March 27, 2026
Kartsev A., Сафронов А. А., Радиотехника и электроника 2024 Т. 69 № 10 С. 989–995
The first-principle modeling of two different quasi-two-dimensional phases based on the volume phases Cr2Te3 and CrTe3 is carried out. Structural relaxation of the obtained 2D compounds and their volumetric prototypes was performed within the framework of the density functional method and the projection plane wave method. Magnetic anisotropy in various crystallographic planes of quasi-two-dimensional structures and corresponding ...
Added: March 17, 2026
Kushchuk L. I., Veretimus D. K., Lega P. V. et al., Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques 2025 Vol. 18 No. 4 P. 859–863
The densities of electronic states in quasi-two-dimensional vanadium nitrides have been studied using density functional theory and the method of the crystal orbital Hamilton population. The contribution of various orbital pairs and their influence on the stability of the magnetic subsystem of these compounds have been analyzed using the crystal orbital Hamilton population (COHP) algorithm. ...
Added: March 16, 2026
Лебедев И. С., Кудрявцев А. В., Kartsev A. et al., Журнал радиоэлектроники 2025 № 11 Статья 30
n this paper, the effect of doping on the electronic and magnetic properties of a monolayer compound Cr(ClxF1-x)3 is studied based on a first-principles calculation. The densities of electronic states, the values of the band gap, the constants of the crystal lattice and the difference in total energies for ferromagnetic and antiferromagnetic configurations at different mutual ...
Added: March 16, 2026
Zabolotnykh A., Zagorodnev I., Kalyabin D. et al., Письма в Журнал экспериментальной и теоретической физики 2026 Т. 123 № 4 С. 293–299
Теоретически изучен микроволновый отклик двумерной (2D) электронной системы, расположенной на диэлектрической ферромагнитной пленке, которая, в свою очередь, лежит на проводящем металле (затворе), при этом вся система помещена во внешнее постоянное магнитное поле. Найдено, что ферромагнитный резонанс пленки и циклотронный резонанс электронов 2D системы в магнитном поле взаимодействуют, что приводит к их расталкиванию (“антикроссингу”). Обнаружено, что в области антикроссинга происходит ...
Added: February 5, 2026
Kalyabin D., Demidov V., Никитов С. А., Физика металлов и металловедение 2025 Т. 126 № 9 С. 1022–1030
Исследовано влияние толщин ферро- и антиферромагнитных слоев на магнитные свойства синтезированной структуры Pt/Co/FeMn/Pt на кремниевой подложке SiO2. Для экспериментального и теоретического исследования использовали петли магнитного гистерезиса, угловые зависимости спектров ферромагнитного резонанса и выражение для резонансного поля, полученное в ходе решения уравнения Ландау–Лифшица для динамики намагниченности. Установлены величины коэрцитивного поля, а также полей однонаправленной и одноосной анизотропии при толщинах антиферромагнитного слоя 5, ...
Added: February 5, 2026
S.S. Apostoloff, Andriyakhina E. S., I.S. Burmistrov, Physics-Uspekhi 2025 Vol. 68 No. 11 P. 1092–1111
This review presents recent work carried out at the Landau Institute for Theoretical Physics of the Russian Academy
of Sciences on the study of the effect of superconducting vortices on the shape and position of Néeel-type skyrmions in superconductor-chiral ferromagnet heterostructures. Based on analytical and numerical approaches, a number of effects caused by the inhomogeneous magnetic ...
Added: January 13, 2026
Karabassov T., Bobkova I. V., Pavel M. Marychev et al., Beilstein Journal of Nanotechnology 2025 Vol. 17 P. 15–23
The diode effect in superconducting materials has been actively investigated in recent years. Plenty of different devices have been proposed as a platform to observe the superconducting diode effect. In this work, we discuss the possibility of a highly efficient superconducting diode design with controllable polarity. We propose a mesoscopic device that consists of two ...
Added: December 22, 2025
Kamashev A. A., Garif’yanov N. N., Validov A. A. et al., Physical Review B: Condensed Matter and Materials Physics 2025 Vol. 112 No. 13 Article 134509
The structures of the superconducting spin valve (SSV) Fe/Si3N4/Pb/Si3N4/Fe (where Si3N4 is a dielectric
insulating layer of controlled thickness) were investigated. The dependence of the magnitude of the SSV effect
on the thicknesses of the superconducting (S) and insulating (I) layers was studied. Optimization of the S and I
layer thicknesses enabled a complete switching between the normal ...
Added: December 20, 2025
Sajhulov T. A., Matveev A. A., Demidov V. V. et al., Журнал экспериментальной и теоретической физики 2025 Т. 168 № 4 С. 500–508
A series of SrMnO₃/La₀.₇Sr₀.₃MnO₃ heterostructures with different thicknesses of the antiferromagnetic SrMnO₃ layer were grown by magnetron sputtering. The magnetic characteristics of the SrMnO₃/La₀.₇Sr₀.₃MnO₃ heterostructure, including the magnitude of unidirectional anisotropy at various thicknesses of the antiferromagnetic SrMnO₃ layer, were determined using ferromagnetic resonance. The results of X-ray structural analysis of the obtained samples are ...
Added: November 19, 2025