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Radiofrequency driving of coherent electron spin dynamics in n-GaAs detected by Faraday rotation
Physical Review B: Condensed Matter and Materials Physics. 2019. Vol. 99. P. 161205-1-161205-5.
Belykh V.V., Yakovlev D. R., Bayer M.
We suggest a pump-probe method for studying semiconductor spin dynamics based on pumping of carrier spins by a pulse of oscillating radiofrequency (rf) magnetic field and probing by measuring the Faraday rotation of a short laser pulse. We demonstrate this technique on n -GaAs and observe the onset and decay of coherent spin precession during and after the course of rf pulse excitation. We show that the rf field resonantly addresses the electron spins with Larmor frequencies close to that of the rf field. This opens the opportunity to determine the homogeneous spin coherence time T2 , that is inaccessible directly in standard all-optical pump-probe experiments.
Belykh Vasilii V., Yakovlev D., Glazov M. et al., Nature Communication 2019 Vol. 10 P. 673
The lead halide perovskites demonstrate huge potential for optoelectronic applications, high energy radiation detectors, light emitting devices and solar energy harvesting. Those materials exhibit strong spin-orbit coupling enabling efficient optical orientation of carrier spins in perovskite-based devices with performance controlled by a magnetic field. Here we show that elaborated time-resolved spectroscopy involving strong magnetic fields ...
Added: November 23, 2019
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
Vankov A., Kaysin B. D., Kukushkin I., JETP Letters 2019 Vol. 110 No. 4 P. 296-300
The behavior of the degree of spin polarization and the specific exchange energy near the Hall ferromagnetic state with filling factor ν = 1 in strongly interacting two-dimensional electron systems in MgZnO/ZnO heterostructures is investigated. These characteristics have been determined by measuring the spectra of inelastic light scattering by the collective excitations of the electron ...
Added: October 31, 2019
Mukhin M., Terent'ev Y. V., Golub L. E. et al., Acta Physica Polonica A 2011 Vol. 120 No. 5 P. 868-869
Spin is the only electron internal degree of freedom, and utilizing it in the new generation of semiconductor devices is the main goal of semiconductor spintronics. Today spintronics focuses mainly on diluted magnetic semiconductors (DMS) where ferromagnetism and giant Zeeman splitting can be obtained due to exchange interaction between free carriers and Mn ions. Most ...
Added: February 19, 2021
49606783, Russian Journal of Mathematical Physics 2019 Vol. 26 No. 2 P. 168-173
The parameters of unstable short-living isotopes are studied from
the mathematical point of view. The values of the chemical potential
and activity parameters that determine the neutron halo arising when
the neutron separates from the nucleus of an unstable isotope are
calculated. The analogy between nuclear physics and economics is
considered from the point of view of such parameters as ...
Added: August 25, 2019
Pobat D. B., Solov'ev V. A., Chernov M. Y. et al., Physics of the Solid State 2021 Vol. 63 No. 1 P. 84-89
The equilibrium distributions of the misfit dislocation density rho(z) and elastic stresses epsilon(z) are calculated along the direction of the epitaxial growth of the metamorphic InAlAs/GaAs(001) layer with higher In content (to 87 mol %) and various profiles of varying the composition: step, linear, and root. The calculations are performed using the method based on ...
Added: May 31, 2021
Matveeva S., Shushakov A., Pozdnyakov I. et al., Photochemical and Photobiological Sciences 2018 Vol. 17 No. 9 P. 1222-1228
It is known that both cis,fac-[RuCl2(DMSO)(3)(H2O)] (1a) and trans,cis,cis-[RuCl2(DMSO)(2)(H2O)(2)] (2a) complexes, which are formed on the dissolution of trans and cis-isomers of [RuCl2(DMSO)(4)] in water, demonstrate light-induced anticancer activity. The first stage of 1a photochemistry is its transformation to 2a occurring with a rather high quantum yield, 0.64 +/- 0.17. The mechanism of the 1a ...
Added: October 31, 2018
Komkov O., Firsov D., Andreev A. et al., Japanese Journal of Applied Physics 2019 No. 58 P. 1-4
Fourier-transform infrared photoreflectance was used to optimize design and growth temperature of complex III–V nanoheterostructures proposed for efficient mid-IR emitters. They comprised an InAs/InGaAs quantum well (QW) with InSb sub-monolayer insertions and were grown by molecular beam epitaxy on GaAs substrates via a convex-graded InAlAs metamorphic buffer layer. The room temperature photoreflectance spectra supported by ...
Added: February 25, 2021
A. A. Melnikov, A. A. Sokolik, Frolov A. V. et al., Applied Physics Letters 2019 Vol. 114 P. 191107-1-191107-5
We have measured the ultrafast anisotropic optical response of highly doped graphene to an intense single cycle terahertz pulse. The time profile of the terahertz-induced anisotropy signal at 800 nm has minima and maxima repeating those of the pump terahertz electric field modulus. It grows with increasing carrier density and demonstrates a specific nonlinear dependence ...
Added: May 21, 2019
49606783, Mathematical notes 2017 Vol. 102 No. 6 P. 824-835
The author constructs his thermodynamics on the following two “first principles”: the
partition theory of integers and the notion of Earth gravity. On the basis of number theory,
equivalence classes in mesoscopy and soft condensates in the partition theory of integers are
considered. The self-consistent equation obtained by the author on the basis of Gentile statistics
is used to ...
Added: November 18, 2018
Mark Blumenau, Kuntsevich A., Journal of the Optical Society of America B: Optical Physics 2024
Standard optical pump-probe methods analyze a system's temporal response to a laser pulse within sub-femtoseconds to several nanoseconds, constrained by the optical delay line's length. While resistance is a sensitive detector in various fields, its measurements are typically slow (>microseconds) due to stabilization requirements. We suggest here a time-resolved pump-probe technique which combines an optical ...
Added: March 16, 2024
Terent'ev Y. V., Zoth C., Bel'kov V. V. et al., Applied Physics Letters 2011 Vol. 99 No. 7 P. 1-3
Diluted magnetic semiconductor heterovalent AlSb/InAs/ZnMnTe quantum well (QW) structures with an electron channel have been designed and grown applying molecular-beam epitaxy. The enhanced magnetic properties of QWs as a result of the exchange interaction with Mn2+ ions, are proved by measuring the microwave radiation induced spin polarized electric currents. ...
Added: February 19, 2021
Terent'ev Y. V., Mukhin M., Toropov A. A. et al., Physical Review B: Condensed Matter and Materials Physics 2013 Vol. 87 No. 4 P. 1-19
Electron spin polarization up to 100% has been observed in type-II narrow-gap heterostructures with ultrathin InSb insertions in an InAs matrix via investigation of circularly polarized photoluminescence in an external magnetic field applied in Faraday geometry. The polarization degree decreases drastically, changes its sign, and saturates finally at the value of 10% in the limit ...
Added: February 18, 2021
Katushkina O. A., Quemerais E., Izmodenov V.V. et al., JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 2017 Vol. 122 No. 11 P. 10921-10937
In this work, we present for the first time the Lyman α intensities measured by Voyager 1/UVS in 2003–2014 (at 90–130 AU from the Sun). During this period Voyager 1 measured the Lyman α emission in the outer heliosphere at an almost fixed direction close to the upwind (i.e.“ toward the interstellar flow). The data show an unexpected behavior in 2003–2009: the ...
Added: January 26, 2018
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., The European Physical Journal C - Particles and Fields 2023 Vol. 83 Article 543
https://link.springer.com/article/10.1140/epjc/s10052-023-11673-x#Abs1 ...
Added: December 4, 2023
Ружицкая Д. Д., САМОЙЛЕНКО А. А., Иванов А. Д. et al., Optoelectronics, Instrumentation and Data Processing 2017 Vol. 54 No. 1 P. 1-8
This paper presents an algorithm for processing the transmission spectra of whisperinggallery optical microcavities for use as a nanoparticle detector. The algorithm is based on the broadening of the microcavity resonance curve during precipitation of nanoparticles on the microcavity surface. Experimental results on the detection of particles are compared with Langmuir adsorption theory. The contribution ...
Added: May 25, 2018
М. : National Instruments Russia, 2017
Содержание сборника составляют доклады с результатами оригинальных исследований и технических решений, ранее не публиковавшиеся. Мы надеемся, что предлагаемый сборник окажется полезным для специалистов, работающих в различных областях науки и техники, для широкого круга преподавателей, аспирантов и студентов ВУЗов, а также для преподавателей средних школ и технических колледжей. ...
Added: May 10, 2017
Загорский Д. Л., Долуденко И. М., Каневский В. М. et al., Известия РАН. Серия физическая 2021 Т. 85 № 8 С. 1088-1094
FeCo and FeNi alloyed nanowires (NW) were obtained by the matrix synthesis method: the effect of the
growth voltage and the effect of using a reference electrode were studied. It is shown that the composition of
FeNi nanowires strongly depends on the growth potential (with its increase, the bcc structure is changing into
fcc), and it is also ...
Added: November 12, 2021
Panina I., Balandin S., Tsarev A. et al., International Journal of Molecular Sciences 2023 Vol. 24 No. 2 P. 1
To date, a number of lantibiotics have been shown to use lipid II — a highly conserved peptidoglycan precursor in the cytoplasmic membrane of bacteria — as their molecular target. The α-component (Lchα) of the two-component lantibiotic lichenicidin (Lchα), previously isolated from the Bacillus licheniformis VK21 strain, seems to contain two putative lipid II binding ...
Added: February 21, 2023
Alfimov M., Litvinov A., Journal of High Energy Physics 2022 No. 01 Article 43
We study regularization scheme dependence of beta-function for sigma models with two-dimensional target space. Working within four-loop approximation, we conjecture the scheme in which the beta-function retains only two tensor structures up to certain terms containing zeta_3. Using this scheme, we provide explicit solutions to RG flow equation corresponding to Yang-Baxter- and lambda-deformed SU(2)/U(1) sigma ...
Added: February 1, 2022
Kuzmichev S. A., Kuzmicheva T. E., Tchesnokov S. N. et al., Journal of Superconductivity and Novel Magnetism 2016 Vol. 29 No. 4 P. 1111-1116
We present temperature dependences of the large and the small superconducting gaps measured directly by SnS-Andreev spectroscopy in various Fe-based superconductors and MgB2. The experimental L,S(T ) are wellfitted with a two-gap model based on Moskalenko and Suhl system of equations (supplemented with a BCS integral renormalization). From the fitting procedure, we estimate the key ...
Added: March 19, 2016
Orekhov M., Russian Journal of Physical Chemistry A 2021 Vol. 95 P. 2059-2064
Molecular dynamic models are created for properties of bivalent ions in organic solvents. It is shown that molecules of the considered solvents bound to ions via oxygen atoms. A theoretical model is developed that describes the ion coordination number. The coordination number in this model is determined by the ratio between the sizes of the ...
Added: October 14, 2021
Min Namkung, Younghun K., Scientific Reports 2018 Vol. 8 No. 1 P. 16915-1-16915-18
Sequential state discrimination is a strategy for quantum state discrimination of a sender’s quantum
states when N receivers are separately located. In this report, we propose optical designs that can
perform sequential state discrimination of two coherent states. For this purpose, we consider not
only binary phase-shifting-key (BPSK) signals but also general coherent states, with arbitrary prior
probabilities. Since ...
Added: November 16, 2020
M. : Faculty of Physics, MSU, 2017
The Low Temperature Physics Conference is an international event held every three years, under the auspices of the IUPAP through its Commission C5 on Low Temperature Physics. The aim of these conferences is to exchange information and views among the members of the international scientific community in the general field of Low Temperature Physics. It ...
Added: October 1, 2017