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Goldstone mode stochastization in a quantum Hall ferromagnet
Physical Review B: Condensed Matter and Materials Physics. 2015. Vol. 92. P. 1654171-1654175.
Experimental and theoretical studies of the coherent spin dynamics of two-dimensional GaAs/AlGaAs electron gas were performed. The system in the quantum Hall ferromagnet state exhibits a spin relaxation mechanism that is determined by many-particle Coulomb interactions. In addition to the spin exciton with changes in the spin quantum numbers of δS=δSz=−1, the quantum Hall ferromagnet supports a Goldstone spin exciton that changes the spin quantum numbers to δS=0 and δSz=−1, which corresponds to a coherent spin rotation of the entire electron system to a certain angle. The Goldstone spin exciton decays through a specific relaxation mechanism that is unlike any other collective spin state.
Muravev V. M., Andreev I. V., Gubarev S. I. et al., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 93 P. 0411101-0411105
It is established that cyclotron resonance (CR) in a high-quality GaAs/AlGaAs two-dimensional electron system (2DES) originates as a pure resonance that does not hybridize with dimensional magnetoplasma excitations. The magnetoplasma resonances form a fine structure of the CR. The observed fine structure of the CR results from the interplay between coherent radiative and incoherent collisional ...
Added: October 23, 2016
Kagan M.Yu., Turlapov A. V., J. Phys.: Condens. Matter 2017 Vol. 29 No. 383004 P. 1-22
Physics of many-body systems where particles are restricted to move in two spatial dimensions is challenging and even controversial: On one hand, neither long-range order nor Bose condensation may appear in innite uniform 2D systems at nite temperature, on the other hand this does not prohibit super uidity or superconductivity. Moreover, 2D superconductors, such
as cuprates, ...
Added: June 23, 2017
Kukushkin I., Vankov A., Kaysin B., Physical Review B: Condensed Matter and Materials Physics 2017 Vol. 96 P. 235401-1-235401-8
We perform a magneto-optical study of a two-dimensional electron systems in the regime of the Stoner
ferromagnetic instability for even quantum Hall filling factors on MgxZn1−xO/ZnO heterostructures. Under
conditions of Landau-level crossing, caused by enhanced spin susceptibility in combination with the tilting of the
magnetic field, the transition between two rivaling phases, paramagnetic and ferromagnetic, is traced in ...
Added: December 19, 2017
Pudalov V.M., Morgun L., Kuntsevich A.Yu, Journal of Superconductivity and Novel Magnetism 2017 Vol. 30 No. 3 P. 783-787
Strongly interacting two-dimensional (2D) carrier system has a tendency to spontaneous spin magnetization and mass divergence. Numerous experiments aimed to reveal these instabilities were not entirely convincing. In particular, spin susceptibility of itinerant electrons, determined from quantum oscillations, remains finite at the critical density of the 2D metal-insulator transition (MIT), n = n (c) . ...
Added: October 16, 2017
Zakhariev I., Aksenov S. A., Logashina I. V., Letters on Materials 2017 № 1 С. 49-54
The paper is oriented toward the problem of determination of rheological characteristics of a material by free bulging testing. This information about the material behavior is used for design of gas forming technologies for production of complex shell parts used in aerospace industry. Realization of such technologies requires pressure forming regimes which can be calculated ...
Added: March 14, 2017
Mainichev D. A., Korenev V. S., Abramov P. A. et al., Dalton Transactions 2012 Vol. 41 P. 14484-14486
Reaction between monolacunary {BW11} tungstoborate and oxothiocationic building block, {Mo2O2S2}, results in the formation of a new polyoxothiometalate with a unique architecture in which two [H2BW12O43]9− tungstoborate subunits are linked together with a hexamolybdate [MoV6O6S6(OH)4(H2O)2]2+ bridge. ...
Added: November 13, 2014
Gromov E.M., Malomed B. A., Communications in Nonlinear Science and Numerical Simulation 2020 Vol. 85 Article 105220
We introduce a nonlinear Schrödinger equation (NLSE) which combines the pseudo-stimulated-Raman-scattering (pseudo-SRS) term, i.e., a non-conservative cubic one with the first spatial derivative, and an external potential, which helps to stabilize solitons against the pseudo-SRS effect. Dynamics of solitons is addressed by means of analytical and numerical methods. The quasi-particle approximation (QPA) for the solitons ...
Added: February 5, 2020
Зайцев В. И., Щавелин В. М., М. : ВИНИТИ РАН, 1985
Added: November 30, 2020
Andreev V. V., Bondarenko G., Stolyarov A. A. et al., Перспективные материалы 2009 № 2 С. 19-24
Исследовано влияние режимов сильнополевой инжекции электронов на модифицикацию МДП-транзисторов с многослойным подзатворным диэлектриком SiO2 – ФСС, содержащим электронные ловушки. Показано, что для инжекционной модификации МДП-транзисторов более предпочтительным оказывается режим инжекции электронов из кремниевой подложки, при котором выше величина максимального сдвига порогового напряжения и существенно ниже вероятность пробоя подзатворного диэлектрика по сравнению с инжекцией из алюминиевого ...
Added: October 14, 2012
Буров А.А., Герман А. Д., Косенко И. И., Космические исследования 2014 Т. 52 № 4 С. 307-312
The problem of planar oscillations of a pendulum with variable length suspended on the Moon’s surface is considered. It is assumed that the Earth and Moon (or, in the general case, a planet and its satellite, or an asteroid and a spacecraft) revolve around the common center of mass in unperturbed elliptical Keplerian orbits. We ...
Added: November 8, 2014
Пенза : ПГУ, 2016
В сборник трудов включены доклады ХХI-го Международного симпозиума «Надежность и качество», проходившего с 23 по 29 мая 2016 г. в городе Пензе.
Рассмотрены актуальные проблемы теории и практики повышения надежности и качества; эффективности внедрения инновационных и информационных технологий в фундаментальных научных и прикладных исследованиях, образовательных и коммуникативных системах и средах, экономике и юриспруденции; методов и средств ...
Added: May 27, 2016
Radkevich A., Semenov A. G., Zaikin A., European Physical Journal: Special Topics 2019 Vol. 227 No. 15-16 P. 2289-2295
We investigate the influence of quantum phase fluctuations on electron density of states (DOS) in ultrathin superconducting films and nanowires. Using an effective action approach we derive a non-perturbative correction to DOS in such systems. The main effect of phase fluctuations in quasi-two-dimensional films is the appearance of electron states at subgap energies while in ...
Added: October 28, 2019
Mainichev D. A., Sokolov M. N., Rogachev A. V. et al., Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya 2014 Vol. 40 No. 7 P. 460-467
Alkyl xanthate complexes [Nb2S4(S2COR)4] (R = Et (I), iso-Pr (II), n-Bu (III), and iso-Am (IV)) are synthesized by the ligand exchange reaction in solutions from (Et4N)4[Nb2S4(NCS)8] and the corresponding potassium salts in satisfactory yields. The X-ray diffraction analyses are carried out for the isopropyl xanthate (II) and butyl xanthate (III) complexes. From the view point ...
Added: November 14, 2014
М. : Физический факультет МГУ, 2012
С 21 по 26 мая в пансионате «Университетский» вблизи Звенигорода проходила XIII Всероссийская школа-семинар «Волновые явления в неоднородных средах» («Волны-2012»), организованная кафедрой фотоники и физики микроволн физического факультета МГУ имени М.В.Ломоносова. ...
Added: March 21, 2013
Prazdnichnykh A., Glazov M., Ren L. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 103 No. 8 P. 085302-1-085302-12
The exciton valley dynamics in van der Waals heterostructures with transition metal dichalcogenide monolayers is driven by the long-range exchange interaction between the electron and the hole in the exciton. It couples the states active in the opposite circular polarizations resulting in the longitudinal-transverse splitting of excitons propagating in the monolayer plane. Here we study ...
Added: March 5, 2021
Andrew G. Semenov, Zaikin A., Physical Review B: Condensed Matter and Materials Physics 2013 Vol. 88 No. 5 P. 054505-1-054505-10
We investigate the effect of interacting quantum phase slips on persistent current and its fluctuations in ultrathin superconducting nanowires and nanorings pierced by the external magnetic flux. We derive the effective action for these systems and map the original problem onto an effective sine-Gordon theory on torus. We evaluate both the flux dependent persistent current ...
Added: February 9, 2015
Bodrova A., Osinsky A., Brilliantov N., Scientific Reports 2020 Vol. 10 Article 693
We study analytically and numerically the distribution of granular temperatures in granular mixtures for
different dissipation mechanisms of inelastic inter-particle collisions. Both driven and force-free systems
are analyzed. We demonstrate that the simplified model of a constant restitution coefficient fails to
predict even qualitatively a granular temperature distribution in a homogeneous cooling state. At the
same time we reveal ...
Added: February 25, 2020
Pelinovsky E., Didenkulova I., Rybkin A., Journal of Fluid Mechanics 2014 Vol. 748 P. 416-432
We present an exact analytical solution of the nonlinear shallow water theory for wave run-up in inclined channels of arbitrary cross-section, which generalizes previous studies on wave run-up for a plane beach and channels of parabolic cross-section. The solution is found using a hodograph-type transform, which extends the well-known Carrier–Greenspan transform for wave run-up on ...
Added: November 19, 2014
Voronova N., Elistratov A., Yurii Lozovik, Physical Review Letters 2015 Vol. 115 No. 18 P. 186402
We theoretically analyze exciton-photon oscillatory dynamics within a homogenous polariton condensate in presence of energy detuning between the cavity and quantum well modes. Whereas pure Rabi oscillations consist of the particle exchange between the photon and exciton components in the polariton system without any oscillations of their quantum phases, we demonstrate that any non-zero detuning ...
Added: October 22, 2015
М. : Издательство математико-механического факультета МГУ, 2009
В настоящий сборник вошли аннотации докладов участников XVI международной конференции «Ломоносов» по секции «Математика и механика». ...
Added: February 4, 2013
IEEE, 2015
Added: March 16, 2015
Пенза : ПГУ, 2015
В сборник трудов включены доклады юбилейного ХХ-го Международного симпозиума «Надежность и качество», проходившего с 25 по 31 мая 2015 г. в городе Пензе.
Рассмотрены актуальные проблемы теории и практики повышения надежности и качества; эффективности внедрения инновационных и информационных технологий в фундаментальных научных и прикладных исследованиях, образовательных и коммуникативных системах и средах, экономике и юриспруденции; методов и ...
Added: May 31, 2015
Chernik V., Акишин А. И., Novikov L. et al., Перспективные материалы 2009 № 4 С. 22-27
Исследовано химическое распыление различных типов углеродных и графитовых материалов в потоках кислородной плазмы с энергией частиц менее 100 эВ. Для нелегированных материалов зависимость коэффициента химического распыления от структуры выражено слабо. Коэффициент распыления легированных бором материалов снижается по мере степени его легирования. С помощью растрового электронного микроскопа исследован рельеф поверхности ряда углеродных материалов. ...
Added: October 14, 2012
Budkov Y., Kolesnikov A. L., Polymer Science - Series C 2018 Vol. 60 No. Supplement 1 P. 148-159
Theoretical models of the conformational behavior of flexible polymer chains in mixed solvents enunciated in the world literature during the last decade are critically reviewed. Models describing different mechanisms of coil-to-globule transitions in a good solvent induced by cosolvent addition are highlighted. Special attention is given to the analysis of theoretical approaches to describing the ...
Added: November 30, 2018