Prikhodko A., Yaropolov T., Shurakov A. et al., CAL-TEK S.r.l., 2022
Mastering of the terahertz frequency band is attractive for numerous practical applications. Fabrication tolerances of widely used computer numerical control machining result in vital increase of input optics losses of active waveguide components at frequencies beyond 1 THz. This issue can be resolved if conventional hollow metallic waveguide technology is replaced by that making use ...
Added: June 6, 2023
Смирнов И. А., Черкесова Л. В., Поркшеян В. М. et al., IEEE, 2019
Development of informational-communicative technologies and radioelectronics of XXI century is related to transmission more and more incrementing data volumes at all, and is oriented on application not only microwave frequencies (SHF), but also subTHz and THz (EHF and HHF) ranges - from 0,1 to 10 THz. Arrangements of these bands are divided into 2 levels: ...
Added: May 10, 2023
Zhukov A., Institute of Physics Publishing (IOP), 2021
8th International School and Conference "Saint-Petersburg OPEN 2021" on Optoelectronics, Photonics, Engineering and Nanostructures was held on May 25 - 28, 2021. The Organizers of the conference are the National Research University "Higher School of Economics" and Alferov Saint Petersburg National Research Academic University of the Russian Academy of Sciences. More than 300 participants from ...
Added: October 26, 2022
Bristol : Institute of Physics Publishing (IOP), 2020
7th International School and Conference "Saint-Petersburg OPEN 2020" on Optoelectronics, Photonics, Engineering and Nanostructures was held on April 27 - 30, 2020. The Organizer of the conference is the Alferov Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences. Initially, the School and ...
Added: December 29, 2020
Жуков А. Е., СПб. : ПОЛИТЕХ-ПРЕСС, 2019
Пособие включает в себя учебные материалы по физике и технологии полупроводниковых квантовых точек и лазеров на основе квантовых точек, включая микролазеры. Квантовые точки – это новая разновидность полупроводниковых квантоворазмерных структур (наноструктур), в которых движение носителей заряда ограничено во всех трех направлениях. Возникающая в результате размерного квантования модификация плотности состояний, а также большая энергия локализации носителей ...
Added: February 10, 2020
Budkov Y., М. : ЛЕНАНД, 2020
Within the presented monograph for the first time statistical approaches, based on the self-consistent field theory, were presented for the theoretical description of the thermodynamic properties of the ion-molecular systems (electrolyte solutions, ionic liquids, dielectric polymers and metal-organic frameworks) in the bulk solution and at the interfaces with the account for their molecular structure. In ...
Added: November 18, 2019
Pugach N., IEEE, 2019
The goal of this International Roadmap for Devices and Systems (IRDS) chapter is to survey, catalog, and assess the status of technologies in the areas of cryogenic electronics and quantum information processing. Application drivers are identified for sufficiently developed technologies and application needs are mapped as a function of time against projected capabilities to identify ...
Added: October 31, 2019
Zaikin A., Golubev D. S., Singapore : Pan Stanford Publishing, 2019
Continuing miniaturization of electronic devices, together with the quickly growing number of nanotechnological applications, demands a profound understanding of the underlying physics. Most of the fundamental problems of modern condensed matter physics involve various aspects of quantum transport and fluctuation phenomena at the nanoscale. In nanostructures, electrons are usually confined to a limited volume and ...
Added: September 12, 2019
ФГБНУ "НИИ ПМТ", 2019
Труды содержат представленные на конференцию доклады из вузовских, академических и отраслевых организаций России и стран СНГ (Армении, Азербайджана, Белоруссии, Казахстана, Узбекистана). В опубликованных докладах содержатся новые результаты исследований процессов образования, миграции и эволюции радиационных дефектов в твердых телах, радиационно-технологических методов модифицирования и обработки материалов с целью улучшения их эксплуатационных свойств, эффектов радиационно-стимулированной диффузии, радиационно-индуцированной сегрегации ...
Added: August 16, 2019
M. : Association of graduates and employees of AFEA named after prof. Zhukovsky, 2018
The materials of The International Scientific – Practical Conference is presented below.
The Conference reflects the modern state of innovation in education, science, industry and social-economic sphere, from the standpoint of introducing new information technologies.
It is interesting for a wide range of researchers, teachers, graduate students and professionals in the field of innovation and information technologies. ...
Added: May 24, 2018
Andrei D. Zaikin, Alex Latyshev, Condensed Matter 2023 Vol. 8 Article 5
Employing charge–flux duality for Josephson junctions and superconducting nanowires, we predict a novel effect of fluxon cotunneling in SQUID-like nanorings. This process is strictly dual to that of Cooper pair cotunneling in superconducting transistors formed by a pairs of Josephson tunnel junctions connected in series. Cooper pair cotunneling is known to lift Coulomb blockade in ...
Added: March 16, 2024
Сатанин А. М., Семенов А. А., рф 2023 Vol. 52 No. 1 P. S373-S378
The generation of a periodic sequence of electromagnetic pulses by an array of Josephson qubits imbedded in a superconducting resonator and coupled to the resonator strip by means of capacitors and inductors (electro-dipole and magneto-dipole interaction) is studied. It is shown that in a single-mode approximation, the system of qubits is described by a generalized ...
Added: March 13, 2024
The combination of strongly coupled Cooper pairs and weak superconducting fluctuations is an important prerequisite for achieving high-temperature superconductivity. The review is devoted to the implementation of this condition in multiband superconductors, in which strongly coupled pairs in the shallow conduction band (the Fermi level is close to the band edge) coexist with ordinary, weakly ...
Added: February 28, 2024
T. Karabassov, JETP Letters 2024 Vol. 119 No. 4 P. 308-309
Recently the diode effect in superconductivity became an active area of research. In particular, the three-dimensional topological insulators may be one of the most suitable materials to implement the superconducting diodes. It is common to consider only linear and quadratic terms of the topological insulator Hamiltonian in the low energy expansion. Typically the effect of ...
Added: February 20, 2024
Мельниченко И. А., Комаров С. Д., Dragunova A. et al., Письма в Журнал технической физики 2024 Т. 50 № 5 С. 3-6
С помощью конфокальной оптической микроскопии и спектроскопии микрофотолюминесценции исследованы субмикронные нановключения InAsxP1-x/InP, сформированные методом селективного эпитаксиального роста в кремнии с использованием металлоорганической газофазной эпитаксии и расплавленной капли элемента III группы. Исследовано влияние расстояния между нановключениями на интенсивность фотолюминесценции, получены температурные зависимости фотолюминесценции в диапазоне 77-290 K. При комнатной температуре получено излучение в спектральном диапазоне 1.2 ...
Added: February 13, 2024
А.С. Захарова, Александров А. А., Поминова Д. В. et al., Journal of Structural Chemistry 2024 Vol. 65 No. 1 P. 138-148
Single-phase powders of a KGd1.52Yb0.40Er0.08F7 solid solution with an average particle size of 350 nm are synthesized by co-precipitation from aqueous solutions with a different order of mixing reagents. Surface leaching processes of potassium are revealed and studied. The optimal temperature of thermal treatment (525 °C) is determined. It enables the achievement of the energy yield of erbium ...
Added: February 12, 2024
Адамов Р. Б., Мелентьев Г. А., Подоскин А. А. et al., Физика и техника полупроводников 2023 Т. 57 № 8 С. 663-673
Исследованы фото- и электролюминесценция в p-i-n-структурах с компенсированными квантовыми ямами GaAs/AlGaAs с различными профилями легирования: с пространственным разделением доноров и акцепторов (доноры локализованы в квантовых ямах, акцепторы - в барьерах) и без него (и доноры, и акцепторы локализованы в квантовых ямах). Изучались спектральные характеристики люминесценции в ближнем ИК диапазоне при гелиевых температурах. Выявлены линии излучательной ...
Added: February 5, 2024
Fominykh N., Kryzhanovskaya N., Ivanov K. et al., Оптика и спектроскопия 2023 Т. 131 № 11 С. 1483-1485
Исследованы характеристики лазерной генерации микродисковых лазеров, сопряженных с оптическим волноводом и работающих в непрерывном режиме при повышенных температурах. Продемонстрированы лазерная генерация и волноводный эффект при температурах вплоть до 92.5 С. Измеренная характеристическая температура микролазеров составила 65 K в диапазоне 25-92.5 С. ...
Added: February 5, 2024
Chernenko N. E., Makhov I., Balakirev S. V. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2023 Vol. 16 No. 3.1 P. 64-68
In this work we present the results of experimental studies of the InAs/GaAs quantum dot formation in subcritical growth modes on nanopatterned substrates. For this purpose, we used two ways for surface patterning: local droplet etching and modified oxide desorption technique. We have experimentally shown that both methods allow in situ formation of nanosized pits ...
Added: February 5, 2024
A quantum-dot microdisk was optically pumped by continuous-wave excitation with a level sufficient for the ground-state lasing. The microdisk was additionally illuminated with sub-ps pulses of various powers. It was found that there is a critical level of pulse power that determines the subsequent transient process of the microlaser. Depending on the level of the ...
Added: February 5, 2024
Bogdanova T. V., D. V. Kalyabin, A. R. Safin et al., Journal of Physics D: Applied Physics 2023 Vol. 56 No. 20 Article 205301
In this work we present a model explaining the properties of magnetoelastic waves propagation in the heterostructure containing an antiferromagnetic layer on a non-magnetic elastic substate. Horizontally polarized shear surface waves (SH-waves) propagating in thin film are Love waves. The dispersion characteristic of magnetoelastic waves in such structure was obtained, and the effect of variation ...
Added: January 31, 2024
Ilyin S., Kostyuk A., Anokhina T. et al., International Journal of Molecular Sciences 2023 Vol. 24 No. 9 Article 8057
The weak point of ionic liquids is their high viscosity, limiting the maximum polymer concentration in the forming solutions. A low-viscous co-solvent can reduce viscosity, but cellulose has none. This study demonstrates that dimethyl sulfoxide (DMSO), being non-solvent for cellulose, can act as a nominal co-solvent to improve its processing into a nanofiltration membrane by ...
Added: January 30, 2024
A quantitative understanding of the molecular-scale mechanisms of radionuclide sorption on different clay minerals is crucial for the development and safe implementation of geological nuclear waste disposal technologies. We apply classical molecular dynamics (MD) computer simulations to study the adsorption of uranyl on the external basal surfaces of two typical clay models. In the illite ...
Added: January 25, 2024
Mariia A., The Newman in Foreign Policy 2023 Vol. 2 No. 65 (109) P. 72-76
The article is aimed at comparing the Asian and European approach represented by the EU and China to the development and formation of a regulatory framework in the field of artificial intelligence. At the beginning of the article the achievements in the field of general and military AI are presented. The analysis of the AI ...
Added: January 17, 2024
Божко С. И., Ксенз А. С., Фокин Д. А. et al., Журнал технической физики 2023 Т. 93 № 7 С. 928-930
The separation of Pb nanoislands on the vicinal surface of Si(7 7 10) into layers 2 nm thick, caused by quantization of the electronic spectrum, implies the formation of two-dimensional defects separating the Pb layers. Using model calculations in the density functional theory approximation, it was shown that the twin boundary has the minimum energy ...
Added: December 20, 2023
Chekmazov S. V., Zagitova A. A., Ionov A. M. et al., Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques 2023 Vol. 17 No. 3 P. 620-624
The electronic and atomic structure and transport properties of black phosphorus single crystals prepared by high-pressure and gas-transport methods were studied by X-ray photoelectron spectroscopy and scanning probe microscopy (STM, AFM). The atomic resolution of the single crystal surface was obtained by scanning tunneling microscopy. After exposure of the clean surface under ambient conditions, the ...
Added: December 19, 2023
Загорский Д. Л., Долуденко И. М., Фролов К. В. et al., Физика твердого тела 2023 Т. 65 № 6 С. 973-978
Исследованы нанопроволоки из железа — образцы в виде массивов параллельных нитей были получены
методом матричного синтеза с использованием трековых мембран. Использовались матрицы с параллельными порами 100 nm, а ростовое напряжение варьировалось — 0.8, 1.0 и 1.2 V. Проведены электронномикроскопически исследования ростовой матрицы и образцов. Полученные данные мёссбауэровской спектроскопии и магнитометрии хорошо коррелируют. Так, сравнение результатов, полученных ...
Added: December 6, 2023
Бизяев Д. А., Хайретдинова Д. Р., Загорский Д. Л. et al., Физика металлов и металловедение 2023 Т. 124 № 8 С. 717-725
Исследованы магнитные свойства слоевых нанопроволок (НП), состоящих из чередующихся слоев
никеля и меди. В таких структурах магнитные свойства определяются несколькими факторами –
аспектным отношением ферромагнитых слоев, дипольным взаимодействием между соседними
слоями внутри одной НП, а также взаимодействием соседних НП. Массивы НП были получены методом матричного синтеза. Слои никеля имели фиксированную толщину 400 нм, толщину слоев
меди варьировали от 25 ...
Added: December 6, 2023
Загорский Д. Л., Долуденко И. М., Хайретдинова Д. Р., Мембраны и мембранные технологии 2023 Т. 13 № 2 С. 137-149
В работе рассмотрены особенности получения металлических нанопроволок методом матричного
синтеза на основе трековых мембран. В первой части работы рассмотрены основные идеи метода и
дан обзор литературы, посвященной получению нанопроволок различных типов – однокомпонентных (из одного металла), и многокомпонентных – из двух или нескольких металлов. Для второго случая рассмотрены варианты получения гомогенных структур – т.н. сплавов и гетерогенных
структур ...
Added: December 6, 2023
Применение различных воздействий для получения обособленных или ориентированных магнитных наночастиц
Долуденко И. М., Хайретдинова Д. Р., Загорский Д. Л. et al., Известия РАН. Серия физическая 2023 Т. 87 № 3 С. 321-327
Методом матричного синтеза были получены гетероструктурные нанопроволоки с чередованием
медных и никелевых слоев; никелевые слои были затем выделены в виде магнитных наночастиц цилиндрической формы. С целью изучения возможности использования полученных наночастиц в
медицине, а именно для адресной доставки лекарств и гипертермии, решались задачи их разделения
(преодоления агломерации) и пространственной ориентации соответственно. ...
Added: December 6, 2023
Shurakov A., Kaurova N., Belikov I. et al., / Cornell University. Series Physics "arxiv.org". 2022.
In this paper, we report on the method of nondestructive quality control that can be used in fabrication of GaAs high-speed electronics. The method relies on the surface potential mapping and enables rigid in vivo analysis of transport properties of an active electronic device incorporated into a complex integrated circuit. The study is inspired by ...
Added: September 15, 2023
Pugach N., Safonchik M. O., Belotelov V. et al., / undefined. Series "cond-mat". 2022. No. 2110.00369.
A detailed investigation of a superconducting spin-triplet valve is presented. This spin-valve consists of a superconducting film covering a metal with an intrinsic spiral magnetic order, which could result from competing isotropic exchanges or, if the crystal lattice breaks central symmetry, from asymmetric Dzyaloshinskii-Moriya exchange. Depending on the anisotropy, such a metal may change its ...
Added: November 16, 2022