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101.
In the GW approximation, it has been shown that, owing to the electron-electron interaction, plasma satellites appear in the spectral function of a two-dimensional electron system on the surface of a topological insulator. They are due to the resonance plasmon-hole scattering. The contribution of satellites to the single-electron density of states is responsible for the downward energy shift of the minimum of the density, which is compared to the Dirac point in the experiment. To analyze the effect of vertex corrections on the resulting spectrum, a method has been proposed that goes beyond the GW approximation by summing ladder diagrams in the expansion of both the polarization function and self-energy. It has been shown with this method that the multiple electron-hole scattering hardly changes the resulting spectrum. 相似文献
102.
Novel redox mediators are necessary in order to increase the efficiency and lifetime of dye-sensitized solar cells. In this work, complex copper and cobalt ions with phenanthroline and bipyridine ligands are studied in the quantum chemical aspect. New complexes with cyano bipyridine derivatives are studied. The redox potentials of the complexes and inner sphere reorganization energies are calculated. 相似文献
103.
V. M. Bystritsky Vit. M. Bystritskii G. N. Dudkin M. Filipowicz S. Gazi J. Huran G. A. Mesyats B. A. Nechaev V. N. Padalko S. S. Parzhitskii F. M. Pen’kov A. V. Philippov Yu. Zh. Tuleushev 《Journal of Experimental and Theoretical Physics》2014,119(1):54-62
The article is devoted to the investigation of a pd-reaction (p + d → 3He + γ(5.5 MeV)) under-going in titanium deuteride in astrophysical collision energy region of protons and deuterons ranging from 5.3 to 10.5 keV. The experiments have been performed using the Hall NR TPU (Tomsk, Russia) pulsed plasma accelerator. The number of accelerated protons in 10 μs pulse was 5 × 1014 at a repetition rate of 7 × 10?2 Hz. Detection of 5.5 MeV gamma rays was carried out using eight detectors based on crystals of NaI(Tl) (100 × 100 × 400 mm) placed around the TiD target. For the first time, the dependencies between the astrophysical S-factor and the effective cross section of the pd-reaction from proton-deuteron collision energy, and the potential electronic screening of the interacting protons and deuterons in titanium deuteride have been measured. 相似文献
104.
V. M. Bystritsky Vit. M. Bystritsky G. N. Dudkin M. Filipowicz S. Gazi J. Huran B. A. Nechaev V. N. Padalko S. S. Parzhitskii F. M. Pen’kov A. V. Filippov Yu. Zh. Tuleushev 《Physics of Particles and Nuclei Letters》2014,11(4):467-472
Characteristics of the pd reaction (p + d → 3He + γ(5.5 MeV)) in titanium deuteride at astrophysical proton-deuteron collision energies ranging from 5.3 to 10.5 keV are investigated. Experiments are conducted on the pulsed plasma Hall accelerator at Tomsk Polytechnic University (Tomsk, Russia). The number of accelerated protons in a pulse 10 μs long is 5 × 1014 at a repetition rate of 7 × 10?2 Hz. Gamma rays with an energy of 5.5 MeV are recorded by eight detectors based on NaI(Tl) crystals (100 × 100 × 400 mm) arranged around the TiD target. The dependence of the astrophysical S factor for the pd reaction on the proton-deuteron collision energy and the electron screening potential of protons interacting with deuterons in titanium deuteride are measured for the first time. 相似文献
105.
A. O. Chagarovskiy O. A. Ivanova E. M. Budynina E. L. Kolychev M. S. Nechaev I. V. Trushkov M. Ya. Mel’nikov 《Russian Chemical Bulletin》2013,62(11):2407-2423
Reaction of donor-acceptor cyclopropanes with 1,3-diphenylisobenzofuran in the presence of lanthanide triflates, as well as CuOTf, Sn(OTf)2, SnCl2, ZnCl2, GaCl3, and MgI2, proceeds as a formal [3+4]-cycloaddition leading to a newly formed seven-membered ring. This reaction was found to be typical of cyclopropane-1,1-diesters and dinitriles, as well as 1-nitrocyclo-propanecarboxylates containing aromatic, heteroaromatic, and vinylic substituents at the C(2) atom of the small ring. When Me3SiOTf, TiCl4, SnCl4, or BF3·OEt2 were used as initiators, unusual cyclic hemiacetals were formed via the conjugate 1,4-addition of a cyclopropane and a nucleophile to the diene moiety. 相似文献
106.
V. N. Nechaev A. V. Viskovatykh 《Bulletin of the Russian Academy of Sciences: Physics》2011,75(10):1378-1380
The linear response of ferroelectric-dielectric composite was studied and the frequency dependences of the real and imaginary
parts of its susceptibility as functions of the ferroelectric granule sizes and temperature were found through exact consideration
of electric fields and nonlocal effects. It is shown that the susceptibility dispersion can be described by Debye formulas
with the parameters dependent on the ferroelectric granule size. 相似文献
107.
Kristavchuk O. V. Sohatsky A. S. Kozlovskiy V. I. Skoi V. V. Kuklin A. I. Trofimov V. V. Sleptsov V. V. Nechaev A. N. Apel’ P. Yu. 《Colloid Journal》2021,83(4):448-460
Colloid Journal - This work is devoted to studying the structural and morphological properties of a silver colloidal solution obtained by the method of electrical-spark discharge in distilled... 相似文献
108.
109.
Vit. M. Bystritskii Vyach. M. Bystritsky J. Wozniak V. M. Grebenyuk E. Gula G. N. Dudkin G. A. Mesyats B. A. Nechaev V. N. Padalko S. S. Parzhitski F. M. Pen’kov N. A. Ratakhin S. A. Sorokin V. A. Stolupin 《Technical Physics》2002,47(9):1098-1105
A method and results of measurements are presented of the ion energy distribution in a deuterium liner accelerated in the inverse Z-pinch, in which the plasma is accelerated electrodynamically from the liner axis. Knowledge of the deuteron energy distribution is of primary importance for the correct interpretation of the experimental results from the study of the dd-reaction in the range of infralow energies with the use of a liner plasma. Experiments were carried out in a high-current pulsed accelerator (I=950 kA, τ=80 ns) at the Institute of High-Current Electronics of the Siberian Division of the Russian Academy of Sciences (Tomsk, Russia). In the initial state, the liner is a supersonic hollow deuterium jet 32 mm in diameter and 20 mm in length. The liner parameters were measured with the help of optical detectors of H α and H β deuterium lines and magnetic probes arranged in a radial direction (along the direction the liner expansion). In addition, scintillation spectrometers and BF3 counters were used to measure the intensity of the neutron flux produced in the d + d → 3He + n reaction. The results obtained by simultaneously analyzing the data from magnetic probes, optical detectors, and neutron detectors point to the possibility of using a rather simple method for measuring the parameters of the liner accelerated up to energies of 3–6 keV. 相似文献
110.
Victor N. Khrustalev Ivan A. Portnyagin Nikolay N. Zemlyansky Irina V. Borisova Yuri A. Ustynyuk Mikhail Yu. Antipin Mikhail S. Nechaev Robert West 《应用有机金属化学》2005,19(6):774-777
Germanium(II) dipropionate (1) has been synthesized and its crystal structure, as well as that of germanium(IV) tetrapropionate (2), has been determined. By contrast to monomeric 2 with monodentate propionate ligands, compound 1 is associated, forming a cyclotetramer [Ge(O2CEt)2]4 (1a) via intermolecular dative C?O → Ge interactions. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献