2304-9782, 2618-8686, 2405-7223
St. Petersburg Polytechnic University Journal. Physics and Mathematics
3
153
2012
RAR
RUS
9-15
Vinnichenko
Maxim
J-6066-2013
35403302800
Firsov
Dmitry
Peter the Great St. Petersburg Polytechnic University
firsov.da@spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Mashko
Marina
mashkomaro@yandex.ru
Shterengas
Leon
Belenky
Gregory
Vorobjev
Leonid
Electron recombination and capture in laser nanostructures with InGaAsSb/AlGaAsSb quantum wells
Time dynamics of photoluminescence intensity was studied in InGaAsSb/AlGaAsSb quantum wells with different compositions of the barrier solid solution. The charge carrier capture time in quantum wells, the energy relaxation times, the lifetime related to resonant Auger recombination were estimated. It was shown that under certain design of nanostructures the resonant Auger recombination can be observed. The influence of temperature and structure design on the Auger recombination rate is discussed.
535.3
laser radiation
mid infrared range
quantum wells
auger recombination
https://physmath.spbstu.ru/article/2012.16.1/
RAR
RUS
15-21
Shaganov
Anton
shaganovanton@gmail.com
Filimonov
Alexey
Peter the Great St. Petersburg Polytechnic University
St. Petersburg, Russian Federation
Koroleva
Ekaterina
57197390995
Fotiadi
Alexander
Peter the Great St. Petersburg Polytechnic University
fotiadi@rphf.spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
The formation of polar nanoregions and nanodomains in SBN-61 single-axis relaxors
The paper is devoted to application of a synchrotron radiation scattering method to the analysis of domain structure ofSr0.6Ba0.4Nb2O6 (SBN) samples. It is experimentally established that at high temperature there are polarizing centers of the varied size in the SBN-61 samples, with center distances down to the units of micron. Domain structure formation in SBN-61 is accompanied by partial disordering caused by increasing of polarization fluctuations. The polarization in the volume of the samples in question was correlated, and a direction of preferred correlation can change depending on the general ordering.
538.913: 620.22 - 022.53
synchrotron radiation
relaxor
domain structure
polarizing centers
polarization fluctuations
https://physmath.spbstu.ru/article/2012.16.2/
RAR
RUS
22-28
Yurova
Valentina
va-yurova@mail.ru
Fedortsov
Alexander
vecher@nwpi.ru
Klimchitskaya
Galina
g_klimchitskaya@mail.ru
Churkin
Yuri
physics@nwpi.ru
The Casimir force pressure onthe dielectric layer in nanoscale solid-state multilayer Al - SiO2 - Si structures
The calculation of the dispersion forces pressure value on the dielectric layer in solid-state multilayer Al - SiO2 - Sistructure widely used in electronic components production is presented. It is shown that the pressure increases sharply in the nanometer range of the dielectric thickness and at the thickness of 1 nm reaches the value of 8 MPa. The calculation results do not depend on the dielectric permittivity model of the structure matters.
53.043, 539.196.3
dispersion force pressure
Casimir effect
metall - dielectric - semiconductor structure
Lifshitz theory
permittivity
https://physmath.spbstu.ru/article/2012.16.3/
RAR
RUS
28-31
Lamkin
Ivan
IALamkin@mail.ru
Menkovich
Ekaterina
ankat.kate@gmail.com
Tarasov
Sergey
SATarasov@mail.ru
Ultraviolet photodiodes on the basis of the contactsof metal and aluminum-nitride gallium solid solutions
The paper considers the problem of creating high-quality ohmic and rectifying contacts to AlGaN solid solutions with a high degree of Al. The basic problems connected with creating ultraviolet photosensitive structures based on the contact metal - AlGaN solid contacts are presented.
621.315.592
UV photodetector
AlGaN
ohmic contacts
Schottky barrier
https://physmath.spbstu.ru/article/2012.16.4/
RAR
RUS
31-36
Radchuk
Natalia
radchukn@gmail.com
Ushakov
Alexander
ushakov@rphf.spbstu.ru
Optical properties of transition metals nanocomposites
The paper contains results of investigation of transition metals nanocomposites on the basis of arabinogalactan. Absorption spectra, optical activity and methods of nanocomposites synthesis are considered.
674.032.14
nanocomposites
arabinogalactan
nickel
cobalt
zinc
absorption spectra
optical activity
plasmon resonance
https://physmath.spbstu.ru/article/2012.16.5/
RAR
RUS
36-44
Kvashenkina
Olga
kvol.spbspu@gmail.com
Features of electronic phase transition in VO2
The details of several stages of the thermal metal-semiconductor phase transition (MSPT) in vanadium dioxide films are experimentally studied. The idea of a joint and coherent coexistence of the two components of MSPT - the electronic and structural components - is substantiated. The problem of the type of metal-semiconductor phase transition in vanadium dioxide is discussed.
538.9
vanadium dioxide
phase transition
Mott transition
Peierls transition
thin films
hysteresis
dimers
https://physmath.spbstu.ru/article/2012.16.6/
RAR
RUS
45-48
Basalkevich
Tatiana
busta.88@mail.ru
Talnishnikh
N.A.
Nadya.FEL@mail.ru
Shmidt
Natalia
Development features of degradation processes in high-power blue InGaN/GaN light-emitting diodes
The paper describes the features of degradation processes, the current-voltage characteristics, electroluminescence spectra and external quantum efficiency. The reasons for the rapid development of degradation processes in high-power blue InGaN /GaN light-emitting diodes, complicating the prediction of their service life, are elucidated.
621.382.038
rapid degradation
InGaN/GaN LEDs
quantum efficiency
current-voltage characteristics
electroluminescence
https://physmath.spbstu.ru/article/2012.16.7/
RAR
RUS
48-55
Gonchar
Igor
goncharmail@gmail.com
Ivanov
A.S.
physics@nwpi.ru
Fedortsov
Alexander
vecher@nwpi.ru
A fast-operating interferometry device for measuring films thickness over the range from ten to one thousand microns
A fast-operating laser-interferometric device for measuring the thickness of films which are transparent in visible or infrared ranges is described in this work. The thickness of the films to be investigated is from 10 µm to 1 mm. Measuring frequency is 25 times per second, time of one measurement is 3·10-4 s. This allows measuring the thickness of unstable films including liquid ones. Due to combining two ways of determining the thickness in one device (by the number of peaks in the angular dependence of the laser beam reflectance coefficient, and by the value of this coefficient at a given angle of incidence) the error in determining the thickness is only 150 nm.
535.8.667.6
laser interferometry
film thickness
solid and liquid films
https://physmath.spbstu.ru/article/2012.16.8/
RAR
RUS
56-59
Zolotov
Sergey
7006335646
Privalov
Vadim
Peter the Great St. Petersburg Polytechnic University
kafedra@physics.spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
The influence of active element geometry on gas discharge laser gain factor
The article deals with new approaches to increase the gain factor of the laser on the He-Ne mixture by changing the geometry of the active element. The amplification gain and the optimum size of the combined sections of the active elements are calculated.
621.373.8
gas laser
gain
active element
power
optimization
https://physmath.spbstu.ru/article/2012.16.9/
RAR
RUS
59-64
Kovalevsky
Dmitry
dmitry.kovalevsky@niersc.spb.ru, d_v_kovalevsky@list.ru
Effects of heterogeneity of potential barriers and lattice finiteness in the Kronig - Penney model
Using the matrix formalism, the wave functions of continuum states and the energies of surface (Tamm) states are calculated in the modified Kronig - Penney model with a special geometry of the potential (an infinitely high potential barrier at the origin of the coordinates, bounding the region of electron motion to positive semi-axis; the height of the potential delta-barrier / the depth of the potential well closest to the origin of the coordinates differs from the height of all other barriers). Particular attention is paid to the case of size quantization in the lattice of finite length
538.915
electrons
Kronig - Penney model
surface states
size quantization
https://physmath.spbstu.ru/article/2012.16.10/
RAR
RUS
64-70
10041592700
https://orcid.org/0000-0003-2511-0188
Karaseov
Platon
platon.karaseov@spbstu.ru
Karabeshkin
Konstantin
yanikolaus@yandex.ru
The features of defect formation in silicon under molecular ion bombardment
Molecular effect in silicon under molecular ion bombardment over a wide energy range is described. Physical mechanisms for explanation of this phenomenon are suggested. Results of experimental studies and computer simulation of processes occurred in Si under Р+ and PF+4. ion bombardment are presented.
539.534.9
ion implantation
silicon
molecular effect
collision cascade
computer simulation
https://physmath.spbstu.ru/article/2012.16.11/
RAR
RUS
71-74
Kiesewetter
Dmitry
Savina
Alla
savall_07@mail.ru
The approximation of Rhodamine dyes fluorescence spectra
Using of different functions for approximation of spectra of fluorescence of Rhodamine has been put forward. The fluorescence spectra of solutions and Rhodamine doped polymeric fibers were measured at different temperatures. The accuracy of approximations was defined.
532.372.082.5: 628.953.2
fluorescence
approximation
spectrum
polymer optical fiber
temperature dependence
https://physmath.spbstu.ru/article/2012.16.12/
RAR
RUS
75-79
Yuhnev
Andrey
Peter the Great St. Petersburg Polytechnic University
a.yukhnev@mail.ru
Sinitsyna
Darya
Peter the Great St. Petersburg Polytechnic University
sinicina.daria@yandex.ru
The blood vessel models: the technology development for makingand following investigation
Methods of making the human blood vessel silicon models are considered. The procedure for measurement of model andcarotid artery diameters under pulsating pressure of liquid is described. The results of compliant coefficients determinationare given.
625.855.3
blood flow phantom
silicon blood vessel model
wall thickness
compliant coefficient
ultrasound scanner
https://physmath.spbstu.ru/article/2012.16.13/
RAR
RUS
80-83
Lukashova
Olga
olga.lukashoa.best@gmail.com
Mokrova
Darya
dashkeria@gmail.com
Kafidova
Galina
gkafidova@gmail.com
Perevoznik
Dmitry
piralta17@gmail.com
A noninvasive speckle sensor of blood flow velocity in the microvasculature
The peculiarities of a noninvasive speckle blood flow velocity sensor development have been considered. Functional elements within the structure of the sensor were optimized, that permitted to produce its mobile version. Also, Bluetooth radio channel, allowing transmitting informational signal to a personal computer for subsequent processing and storage, was included in the sensor e-frame. Experimental results of the sensor testing are presented.
681.784.8
speckle field
microcirculation
autocorrelation
noninvasive sensor
https://physmath.spbstu.ru/article/2012.16.14/
RAR
RUS
83-91
12784708700
Kapralova
Victoria
Peter the Great St. Petersburg Polytechnic University
kapralova2006@yandex.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Nazarova
Elena
elenanzrv@rambler.ru
Ivanova
Nataliya
ivamel@mail.ru
Shadrin
Evgeniy
shadr.solid@mail.ioffe.ru
Albumin conformational changes as a diagnostic parameter
Thermoimpedancemetric curves of human serum albumin aqueous solutions of various concentrations and pH are obtained. It is shown that the globule-coil transition in individual globules is observed and the curve shape reflects albuminconformational changes including changes under the different denaturants influence. The possibility of denaturation kinetics study by means of thermoimpedancemetry is demonstrated. Results obtained allow to expand diagnostic capabilities of cerebrospinal fluid thermoimpedancemetry on the conformational diseases.
577.322; 541.64:537.3
human serum albumin
denaturation
conformational diseases
thermoimpedancemetry
diagnostics
https://physmath.spbstu.ru/article/2012.16.15/
RAR
RUS
92-95
Khaiyrullin
Andrey
ahairullin@hotmail.com
Stepanova
Tamara
t_stepanova2005@mail.ru
Rozhkova
Natalia
geolog@krc.karelia.ru
Gladchenko
Svetlana
Dipole moments of C60 fullerene in benzene, toluene and orthoxylene
The determination of dipole moments of C60 fullerene has been carried out in benzene, toluene and ortoxylene solutionsunder infinite dilution. It was found that dipole moments are 1.0 D, 1.8 D and 2.27 D in toluene, benzene and ortoxylene, respectively.
It means that there are isolated C60 molecules in toluene solution but associated clusters with constant stoichiometry in benzene and ortoxylene solutions.
537.226:544.163.2
dielectric permettivity
dipole moment
association
solution
C60 fullerene
toluolene
ortoxylene
benzene
https://physmath.spbstu.ru/article/2012.16.16/
RAR
RUS
96-99
Berdnikov
Alexander
Peter the Great St. Petersburg Polytechnic University
alexber@phmf.spbstu.ru
Russia, 195251, St.Petersburg, Polytechnicheskaya, 29
Ivanishchev
Dmitry
Kotov
Dmitry
Peter the Great St. Petersburg Polytechnic University
dmitriy.kotov@gmail.com
Ryabov
Victor
Ryabov
Yuri
Samsonov
Vladimir
The measurement of electromagnetical signs of quark-gluon plasma in heavy ion collisions at 62.4 GeV
Dilepton spectra in Au+Au collisions at √SNN = 62.4 GeV and calculation of dilepton pair cocktail from known sources have been presented.
539.125.17; 539.126.17
quark-gluon plasma
leptons
production
temperature
analysis
https://physmath.spbstu.ru/article/2012.16.17/
RAR
RUS
99-110
Pavlov
Fedor
The calculation of matrix elements for the electromagnetic deuteron current in a formal light description cone
The paper investigates the behavior of matrix elements for the electromagnetic deuteron as a function of the momentumtransfer. Matrix elements in question were calculated in the light cone formalism using the criteria for option of matrix elements for the plus-component of the electromagnetic current in the Breit frame.
539.128.2, 539.171.016
deuteron
light cone
matrix elements of the electromagnetic current
Breit frame
https://physmath.spbstu.ru/article/2012.16.18/
RAR
RUS
111-118
Pavlov
Fedor
Berdnikov
Yaroslav
Peter the Great St. Petersburg Polytechnic University
berdnikov@spbstu.ru
Angular condition for matrix elements of the electromagnetic deuteron current
The paper is devoted to investigation of Grach-Kondratyuk angular condition. The matrix element of the «plus» component of the electromagnetic current of the deuteron defines four independent functions. Whereas, the matrix element should be expressed in three of the deuteron form factors: the charge, magnetic and quadrupole. This means that there must be additional equation. This equation is called the angular condition. The paper investigates the behavior of this condition as a function of the square of the momentum transfer, and shows its violation.
539.128.2, 539.171.016
deuteron
light cone
matrix elements of the electromagnetic current
angular condition
https://physmath.spbstu.ru/article/2012.16.19/
RAR
RUS
118-123
Berdnikov
Yaroslav
Peter the Great St. Petersburg Polytechnic University
berdnikov@spbstu.ru
Ivanov
Alexey
alexey.ivanov86@gmail.com
Kim
Victor
victor.t.kim@gmail.com
Suetin
Daniil
suetindaniil@gmail.com
Nuclear effects in hadron-nuclear interactions at high energies
The process of hard interaction of hadrons with nuclei at high energies is studied, results of modeling of lepton pairs production in hadron-nuclear interactions in the Drell - Yan process are presented. Comparison with experimental data from E772 and E886 collaboration is carried out. Fine matching of HARDPING model with experiment is obtained.
539.125.17; 539.126.17
hadron-nuclear collisions
multiple scattering
energy losses
hardping
https://physmath.spbstu.ru/article/2012.16.20/
RAR
RUS
124-128
Vishnevsky
Vyacheslav
Pustovalova
Olga
Ivanova
Olga
ddemidova@mail.ru
Strecopitova
Maria
ddemidova@mail.ru
The stability of the stationary polymeasure equilibrium regime
The paper proves the theorems of the stability of the integral manifold of a system of differential equations and the asymptotic stability of the equilibrium regime of a system of differential equations.
517.929
regime
function
stability
inequality
family
https://physmath.spbstu.ru/article/2012.16.21/
RAR
RUS
128-132
Pervadchuk
Vladimir
pervadchuk@mail.ru
Shumkova
Daria
shumkova_darya@mail.ru
Dektyarev
Dmitry
Matters of solvability and derivation of optimization systems in variational problems described by two-dimensional parabolic equations
In this paper we obtain conditions for the solvability of the optimal control of two-dimensional nonlinear equation of parabolic type. In this case the function of optimal control is determined explicitly and depends on the solution of the resulting optimality system.
517.97
optimal control
partial differential equations
system of optimality
compromise control
https://physmath.spbstu.ru/article/2012.16.22/
RAR
RUS
133-135
Fedotov
Alexey
Alex3238024@yandex.ru
Lisin
Sergey
Using of nonlinear minimization theory for applied problems of design of objects properties
An analysis and a design of objects parameters and their properties have been carried out by application of the minimization theory procedure using experimental data and their restoring. The theory of the best estimation change was taken to extract validly the scientific and technical information from experiments. The strategies for regeneration of experimental dependencieswere developed by means of results representation, experiments deviations and other things.
621.314.571:51.080(045)
nonlinear mathematical model
numerical solution
regressive functional
approximation
https://physmath.spbstu.ru/article/2012.16.23/
RAR
RUS
136-144
Vasiliev
Alexander
a.n.vasilycv@gmail.com
Tarkhov
Dmitry
dtarkhov@gmail.com
Parametrical neural network models of classical and nonclassical problems for heat conduction equation
Problems of mathematical modeling for complex systems are considered in the paper in terms of neural network technique. System parameters are given in some variation intervals. Neural network model of nonstationary temperature field inthe case of both classical and non-classical problem statement is cited as an example. Results of neurocomputing for accurate and noise data are given.
004.032.26+519.63:517.951
boundary value problem (bvp)
interval parameter
modeling
artificial neural network training
error functional
global optimization
https://physmath.spbstu.ru/article/2012.16.24/
RAR
RUS
144-155
Nguyen
Van
thangspbstu@mail.ru
Arseniev
Dmitry
Belyaev
Alexander
13augen@mail.ru
The stability of motion of the shaft supported by floating ring bearings and its self-oscillation with allowance of lubrication hydrodynamics and centrifugal forces
Our study gives the theoretical representation of the stability of the balance position of the shaft supported by floating ring bearing with allowance of lubrication hydrodynamics and centrifugal force. The basic results are referred to the shortbearing investigation.
621.822.171-251
centrifugal forces
stability
self-oscillation
short bearing
lubrication hydrodynamics
https://physmath.spbstu.ru/article/2012.16.25/
RAR
RUS
155-170
Zhgutov
Vladimir
abc.kitezh@gmail.com
Geometrically nonlinear thermoplasticity mathematic models of shells with the variable thickness
The mathematical deformation models of variable thickness shells (smoothly-variable anb ribbed shells), experiencing either mechanical load or permanent temperature field and taking into account the geometrical nonlinearity, nonlinearelasticity and transverse shear, were developed. There are given refined geometrical proportions for geometrically nonlinear and steadiness problems.
539.3
variable thickness shells (smoothly-variable and ribbed shells)
thermoelasticity
geometrical nonlinearity
nonlinear elasticity
transverse shear
https://physmath.spbstu.ru/article/2012.16.26/
RAR
RUS
171-181
Sanin
Andrey
andreylsanin@yandex.ru
Semyonov
E.A.
seaman2003@tut.by
Quantum Duffing oscillators: free and coupled, noise action
The numerical integration of the non-stationary two-dimensional Schrödinger equation was carried out. In the context of quantum wave-packets, dynamical means, Fourier spectra, uncertainty relations, autocorrelators there were studied the dynamical properties for two coupled quantum Duffing oscillators. It is shown that synchronization for identical oscillatorsand partial transmission of the frequency spectrum in non-identical oscillators takes place. It was found that increasing of noise power leads to the amplitude reduction of the complex-shaped oscillations and the expansion of the frequency spectra.
530.145
quantum Duffing oscillators
coupling
synchronisation
noise
spectra
https://physmath.spbstu.ru/article/2012.16.27/
RAR
RUS
182-190
Apushkinsky
Evgeniy
Peter the Great St. Petersburg Polytechnic University
apushkinsky@hotmail.com
Nonlinear signal spectra transformations
Echo formation occurs in media consisting of many individual oscillators which are able to interact with the external exciting field and have slightly different frequencies. Each this oscillator is considered as a quadripole transforming the input signals. We show that the delay operation with some conversion of the signals will be carried out if each quadripole transforming, has a nonlinearity, in which the spectrum of its output is connected to the spectrum of the input signal through a nonlinear transformation.
530.182
echo signals
nonlinear transformation of the spectra
nonlinear oscillators
https://physmath.spbstu.ru/article/2012.16.28/
RAR
RUS
191-195
Vasil’ev
Gennadiy
Gennady.Vasilyev@mail.ioffe.ru
Kholupenko
Evgeniy
eugene@astro.ioffe.ru
Yablokov
Sergey
Yablokov S.N.
Bayko
Denis
baiko@astro.ioffe.ru
Bykov
Andrey
yk@astro.ioffe.ru
Krasil’shchikov
Alexander
kra@astro.ioffe.ru
Pavlov
Georgiy
pavlov@astro.psu.edu
The influence of the night-sky background on ground-based observations of gamma-ray bursts in the range between 1 and 10 GeV
The influence of night-sky background on detecting cosmic gamma-ray bursts and measurements of their light curves with ground-based Cherenkov telescopes in the range between 1 and 10 GeV is considered. It is shown that the probability of registration of Cherenkov flashes from cosmic gamma-quanta decreases significantly at energies less than 3 GeV under the influence of night sky optical background even if the sensitivity of detecting units is better than that of modern Cherenkov telescopes.
524, 539.1
gamma-rays
cherenkov radiation
extensive atmospheric showers
gamma-ray bursts
night-sky background
https://physmath.spbstu.ru/article/2012.16.29/
RAR
RUS
195-201
Bykov
Andrey
yk@astro.ioffe.ru
Gladilin
Petr
peter.gladilin@gmail.com
Osipov
Sergey
osm2004@mail.ru
Pavlov
Georgiy
pavlov@astro.psu.edu
Role of firehose instability in diffusive shock acceleration
Comparison of the contribution of pressure anisotropy to growth rates of instability with the contribution of current anisotropy of distribution function of the accelerated particles is carried out in shock prefronts of the supernova remnants. It is shown that the contribution of anisotropy of pressure can be important at disturbance scales close to gyroradii of the fastest accelerated particles.
524,3-6
interstellar medium
supernova remnants
diffusive shock acceleration (dsa)
https://physmath.spbstu.ru/article/2012.16.30/
RAR
RUS
201-210
Uvarov
Yuri
uv@astro.ioffe.ru
Bykov
Andrey
yk@astro.ioffe.ru
Pavlov
Georgiy
pavlov@astro.psu.edu
Levenfish
Kseniya
ksen@astro.ioffe.ru
Kropotina
Yuliya
Kropotina Yu.A.
Vela pulsar wind nebula: determination of the anisotropy of accelerated particle distribution function
A geometric model of Vela pulsar wind nebula (PWN) is suggested. The method of determination of leptonic distribution function anisotropy is developed based on the comparison of high resolution roentgen Chandra images of Vela PWN with model predicted images. An angular dependence of distribution function in the nebula rest frame is obtained in the ranges ofangle between particle velocity and pulsar wind direction T: 10q < T < 90q and 130q < T < 160q.
524.3-1 7, 524.354
pulsar wind nebula
synchrotron radiation
diffusive shock acceleration (DSA)
https://physmath.spbstu.ru/article/2012.16.31/
CHR
RUS
211-214
Kozhevnikov Nikolay
M.
nkozhevn@mail.ru
The anniversary session of the Presidium of the Scientific and Methodological Council on Physics of the Ministry of Education and Science of the Russian Federation
The results of the meeting of the Presidium of the Scientific and Methodological Council on Physics dedicated to the 10th anniversary of the Council’s activity in its current make-up are presented. Upon discussing the Council performance report the Presidium passed a number of constructive resolutions.
378.1:53
physics
training programmes
scientific and methodological council
problems of education
https://physmath.spbstu.ru/article/2012.16.32/