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Nagaev K.E.,Institute of Radioengineering and Electronics | Ayvazyan O.S.,Moscow Institute of Physics and Technology | Sergeeva N.Y.,Moscow Institute of Physics and Technology | Buttiker M.,University of Geneva
Physical Review Letters | Year: 2010

We calculate the magnetic-field-dependent nonlinear conductance and noise in a two-dimensional macroscopic inhomogeneous system. If the system does not possess a specific symmetry, the magnetic field induces a nonzero third cumulant of the current even at equilibrium. This cumulant is related to the first and second voltage derivatives of the spectral density and average current in the same way as for mesoscopic quantum-coherent systems, but these quantities may be much larger. The system provides a robust test of a nonequilibrium fluctuation relation. ©2010 The American Physical Society. Source


Syvorotka I.I.,Scientific Research Corporation | Vetoshko P.M.,Institute of Radioengineering and Electronics | Skidanov V.A.,Institute for Design Problems in Microelectronics | Shavrov V.G.,Institute of Radioengineering and Electronics | Syvorotka I.M.,Scientific Research Corporation
IEEE Transactions on Magnetics | Year: 2015

Iron garnet films with various compositions Y3Fe5O12 (YIG), (LuPr)3Fe5O12 (LuPrIG), and Tm3(FeSc)5O12 (TmScIG) were grown by liquid phase epitaxy on gadolinium gallium garnet substrates. The angular dependences of in-plane transverse magnetic susceptibility χ′(φ) were investigated to estimate their applicability as a fluxgate core. The χ′(φ) dependence permitted the determination of the anisotropy field HC in the film plane. Experimentally obtained values of HC show good agreement with theoretical values and correspond to 2.5, 0.92, and 0.03 Oe for YIG, LuPrIG, and TmScIG epitaxial films, respectively. The influence of garnet composition on mechanisms of decreasing of induced in-plane anisotropy field was determined. TmScIG films exhibit about 100-fold reduction in the anisotropy in the plane of the film as compared with films of pure YIG. © 2015 IEEE. Source


Catelani G.,Yale University | Glazman L.I.,Yale University | Nagaev K.E.,Institute of Radioengineering and Electronics
Physical Review B - Condensed Matter and Materials Physics | Year: 2010

We calculate the ac linear response of a superconductor in a nonequilibrium electronic state. The nonequilibrium state is produced by injecting quasiparticles into the superconductor from normal leads through asymmetric tunnel contacts. The dissipative part of the response is proportional to the total density of the injected quasiparticles regardless of the imbalance between the numbers of electronlike and holelike excitations. At fixed quasiparticle density, the lower their effective temperature, the stronger is the dissipation. © 2010 The American Physical Society. Source


Kozlovsky V.,RAS Lebedev Physical Institute | Krivobok V.,RAS Lebedev Physical Institute | Nikolaev S.,RAS Lebedev Physical Institute | Onishchenko E.,RAS Lebedev Physical Institute | And 3 more authors.
Journal of Russian Laser Research | Year: 2016

A technique of fabrication of fully-hybrid microcavities using II-VI semiconductor compound epilayers and distributed Bragg reflectors based on amorphous dielectric coating is described. The fully hybrid microcavities with Zn(S)Se epilayers are created. High structural and optical quality of the embedded Zn(S)Se thin films was established by atomic-force microscopy and optic studies. The analysis of excitonic spectra for Zn(S)Se epilayers embedded in the fully hybrid microcavities indicates that such structure can be perspective for creation of a new type of light-emitting devices – polariton lasers. © 2016 Springer Science+Business Media New York Source


Nagaev K.E.,Institute of Radioengineering and Electronics | Kostyuchenko T.V.,Institute of Radioengineering and Electronics
Physical Review B - Condensed Matter and Materials Physics | Year: 2010

Using a semiclassical Boltzmann equation, we calculate corrections to the Sharvin conductance of a wide two-dimensional electron gas ballistic contact that result from an electron-electron scattering in the leads. These corrections are dominated by collisions of electrons with nearly opposite momenta that come from different reservoirs. They are positive, increase with temperature, and are strongly suppressed by a magnetic field. We argue that this suppression may be responsible for an anomalous positive magnetoresistance observed in a recent experiment. © 2010 The American Physical Society. Source

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