lnterphase electronic localized states in germanium-Langmuir films of copper stearate structures
lnterphase electronic localized states in germanium-Langmuir films of copper stearate structures
V.В. Zaitsev, О.V. Konovalov, G.S. Plotпikov, L.А. Feigin, аnd D.L. Yakovenko
The structural, electrophysical, and optical properties of heterostructures of semiconductor-Langmuir-Blodgett film type have been studied. Oriented films of stcaric acid, doped with copper ions, have been synthesized for the first time on tl1e surfacc of germanium, and their structural characteristics have been determined. The role of doping in the formation of additional trapping sites of charge carriers at the semiconductor /film interface and in the film proper has been estaЫished. The luminescence of copper complexes in the film has been studied. The role of dimensional effects is pointed out.
Show AbstractСоnсеrning the theory of stimulated Raman scattering in а plasma
Соnсеrning the theory of stimulated Raman scattering in а plasma
О.М. Bilak аnd S.Yu. Nikitin
The authors consider the stimulated R.aman scattering (SRS) of powerful laser radiation in а hot inhomogeneous plasma. An expression was oЪtained for the SRS increment, wl1ich takes account of the electron plasma wave damping, the plasma inhomogeneity and of the pumping radiation modulation.
Show AbstractА contribution to the theory of exchange amplification in high-temperature superconducting systems
А contribution to the theory of exchange amplification in high-temperature superconducting systems
А.V. Vedyaev, А.М. Savchenko, А.V. Stefanovich, аnd М.Yu. Nikolaev
The effect of exchange amplification of electron-phonon interaction in hightemperature superconducting systems has been considered and the upper bound of applicabllity of quasi-linear equations has been determined. It has been show11 that these equations are valid if the resonance value of tl1e wave vector $k_r=max(k_{r_{1}},k_{r_{2}})\ll p_F/\hbar$, where PF is tl1e Fermi momentum, as $k_r\sim k_c$, то $\hbar k_c/p_F$. It follows that the quasi-linear theory of high-temperature systems can Ье used to calculate the critical temperature $Т_с$ when the spin-phonon coupling parameter ($\zeta\gg 1$, and to determine the criteria for synthesizing new high-temperature superconducting materials.
Show AbstractTelluric currents caused bу tidal effects
Telluric currents caused bу tidal effects
V.I. Grigor'ev аnd Е.V. Grigor'eva
А critical analysis is done on the traditional approach, based on Ohm's law, to the investigation of telluric fields and currents. А new way of looking has been proposed, which leans upon the baroelectric redistribution of charges in the Earth duc to tidal cffects.
Show AbstractОп turbulence effect оп settling of particles from а suspension current
Оп turbulence effect оп settling of particles from а suspension current
Yu.G. Pyrkin, I.В. Romanova, аnd М.А. Silaev
The effect of turbulence on the settling rate of particles in а suspension current is discussed. А model based on the equation of motion for а single particle in а viscous fluid is analyzed. А formula has been derived for calculating the nonlinearity parameter which determines the dependcnce of the drag force of а moving particle on its settling ratc. The dependence of the nonlinearity parameter on the Reynolds number of а flow has been calculated from the experimental values of settling rates for particles of various sizes in а turbulent flow.
Show AbstractА пеw type of solitary waves оп water
А пеw type of solitary waves оп water
S.А. Arsen'ev, М.М. Vakhrushev, аnd N.К. Shelkovnikov
The problem of describing the nonlinear processes which control the propagation of solitary waves оп water is considered. The classical theory of Korteweg-de Vries is generalized for the case when the nonlinear interaction of amplitude and frequency dispersions is taken into account. The derived formulas which predict the solitary waves of а new type are checked in laboratory experiments.
Show AbstractMultipole harmonics of polarization of cosmic microwave background radiation
Multipole harmonics of polarization of cosmic microwave background radiation
М.V. Sazhin аnd V.V. Shul'ga
The formation of the polarization of the cosmic microwave background radiation {the CMBR) during а standard recombination is considered. The amplitudes of multipole harmonics were calculatcd for various indices of the spcctrum {n = 1 and 1.5) and various types of perturbations: scalar perturbations and gravitational waves.
Show AbstractОп а type of nonlinear internal waves
Оп а type of nonlinear internal waves
М.В. Tverskoy
А new class of solutions of an exact system of dynamic equations for а stratified liquid that describe circular nonlinear transversal steady-state waves has been found. An approximate equation for the profile of such waves and also а nonlinear dispersion rclation have been derived.
Show AbstractCalculation procedure for а longitudinal-transverse electrostatic flat undulator
Calculation procedure for а longitudinal-transverse electrostatic flat undulator
V.А. Kubarev
The procedure based on the use of potentials for periodic systems of linear charges allows us to derive exact formulas for the parameters of an electrostatic undulator. The design of а longitudinal-transverse undulator with oval and corrugated electrodes has been discussed and optimized.
Show AbstractВлияние адсорбции на перенос заряда в системе пористый кремний — металл
Влияние адсорбции на перенос заряда в системе пористый кремний — металл
В.М. Демидович, Г.Б. Демидович, С.Н. Козлов, С.П. Лунга, А.А. Петров
Изучено влияние адсорбции акцепторных и донорных молекул на вольт-амперные характеристики структур кремний — пористый кремний — металл. Показано, что изменение тока через структуру при адсорбционных воздействиях может достигать десятков и сотен процентов. Обнаружено, что знак адсорбционного эффекта определяется квазиобъемным молекулярным «легированием» пористого кремния в процессе адсорбции.
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