Semiconducting CrSi 2 nanocrystals (NCs) with high density (4×1010 cm −2 ) and narrow size distribution were grown by reactive deposition epitaxy (RDE) of 0.6 nm Cr at 550 °C on Si(111)7 ×...
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Semiconducting CrSi 2 nanocrystals (NCs) with high density (4×1010 cm −2 ) and narrow size distribution were grown by reactive deposition epitaxy (RDE) of 0.6 nm Cr at 550 °C on Si(111)7 × 7 substrate. Based on DRS, AFM and TEM results silicon cap epitaxy growth procedure on silicon with high density of CrSi 2 NCs has been proposed. Monolithic Si(111)/ CrSi 2 NCs/Si(111) structures with three layers of buried CrSi 2 NCs have been successfully grown by repeating of CrSi 2 NCs formation and silicon epitaxial growth. Electrical characterization of Schottky junctions formed on the grown structures has shown that the formation of point defects generated during the growth of the Si cap layer strongly depends on the cap growth conditions and on the Cr deposition rate.
To study structural and transport properties of the surface phases on silicon, a number of adsorbate/silicon systems on Si(100) and Si(111) surfaces has been investigated using scanning tunneling microscopy (STM), ref...
To study structural and transport properties of the surface phases on silicon, a number of adsorbate/silicon systems on Si(100) and Si(111) surfaces has been investigated using scanning tunneling microscopy (STM), reflection-high-energy-electron diffraction (RHEED) and in-situ electrical resistance measurements. Results of investigations of formation and electrical properties of Si-Al, Si-Na, Si-Ag and Si-In surface structure are presented.
In this work buried nanocrystalline CrSi 2 layers were synthesized by ion implantation, pulsed annealing and MBE. The structural, optical and thermoelectrical properties of CrSi 2 layers were studied by methods of SEM...
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In this work buried nanocrystalline CrSi 2 layers were synthesized by ion implantation, pulsed annealing and MBE. The structural, optical and thermoelectrical properties of CrSi 2 layers were studied by methods of SEM, TEM, RBS, PL and Seebeck coefficient measurements. The characteristic features of pulsed nanosecond annealing of Cr-implanted Si and epitaxial growth of triple Si/nc–CrSi 2 /Si heterostructures were established. It is shown that grown Si/nc–CrSi 2 /Si heterostructures, which preliminary implanted with the high-dose ( ϕ = 6 × 1016 cm − 2 ) of Cr + ions, have the noticeable low temperature ( T = 10 – 100 K ) photoluminescence signal at 1450–1600 nm and the large Seebeck coefficient (−(60–300) μV/K) in the temperature range of T = 340 – 415 K .
During AES and EELS investigations of thermal stability of Mg and Mg 2 Si films it was found that metallic Mg desorbs from the surface at temperatures higher than 80 °C, but the bulk-like Mg 2 Si film shows ...
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During AES and EELS investigations of thermal stability of Mg and Mg 2 Si films it was found that metallic Mg desorbs from the surface at temperatures higher than 80 °C, but the bulk-like Mg 2 Si film shows a thermal stability up to 180 °C. The maximal thermal stability up to 230 °C was observed for a two-dimensional magnesium silicide with structure (2/3√3×2/3√3)- R 30°. A model of its thermal stability based on the peculiarities of the electronic structure of a two-dimensional magnesium silicide with structure (2/3√3×2/3√3)- R 30° and on the continuity of 2D film was proposed.
A structural model for two-dimensional silicide with structure ( 2/3 √3× 2/3 √3)-R30°, consisting of five layers (three layers of Mg and two layers of Si) with all Mg–Si fixed bonds, was proposed on the b...
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A structural model for two-dimensional silicide with structure ( 2/3 √3× 2/3 √3)-R30°, consisting of five layers (three layers of Mg and two layers of Si) with all Mg–Si fixed bonds, was proposed on the basis of EELS data. The observed redshift of EELS bulk plasmon on 0.8 eV is satisfactorily explained in the framework of the model by the reduction of carrier density and formation of fixed Mg–Si bonds.
In this paper we analyzed the properties of the approximating polynomials, obtained by the method of least squares. It was revealed that with increasing density and uniformity of the distribution of examples on the in...
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In this paper we analyzed the properties of the approximating polynomials, obtained by the method of least squares. It was revealed that with increasing density and uniformity of the distribution of examples on the interval of approximation, the criterion of minimum mean-square error indirectly brings to equality of the integral characteristics of the approximating polynomial and the approximated function. The method has been suggested to parameterize of the approximating polynomials on the basis of this, and the numerical experiments demonstrated advantages.
The results of the experiments on femtosecond GW laser pulse interaction with isolated millimeter-sized water droplets are presented Temporal and spatial dynamics of optical breakdown in a liquid particle volume is in...
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The results of the experiments on femtosecond GW laser pulse interaction with isolated millimeter-sized water droplets are presented Temporal and spatial dynamics of optical breakdown in a liquid particle volume is investigated. The mechanical fragmentation of the droplet as a result of the evaporation and explosion of superheated areas is also discussed. The spectral characteristics of water particle emission during its explosive boiling are investigated.
This paper presents the development of a free-surface three-dimensional oceanographic model, for the use on cluster computers. The s-coordinate, free surface model is based on full nonlinear primitive equations of the...
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This paper presents the development of a free-surface three-dimensional oceanographic model, for the use on cluster computers. The s-coordinate, free surface model is based on full nonlinear primitive equations of the ocean. Numerical integration procedure is based on time-splitting method with Robert-Asselin filtering. Parallelism is provided via high-level message-passing routines. The resulting numerical code allows an efficient use of a cash memory to minimize processor-memory data exchange.
The modes of dynamics of genetic structure and population size are investigated in this work. It is assumed that main population characteristics, such as reproductive potential and survival rate of reproductive part o...
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The modes of dynamics of genetic structure and population size are investigated in this work. It is assumed that main population characteristics, such as reproductive potential and survival rate of reproductive part of population in following years of life are determined on genetic level. Our research has shown that despite increasing of average population fitness is followed by arising of complicated dynamics of population size and of genetic structure, further growth of fitness is capable to stabilize the genetic structure of population and so only the population size will be fluctuating with regular or chaotic circling. The type of the final genetic equilibrium depends upon initial conditions in a very complicated way. Therefore the initial conditions play essential role for the evolution of natural population.
This work considers the results of optimal harvest with constant quota in population with two age-classes. It has been analytically shown that maximum of income is not achieved under the catch from both age-classes si...
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This work considers the results of optimal harvest with constant quota in population with two age-classes. It has been analytically shown that maximum of income is not achieved under the catch from both age-classes simultaneously. It has been shown that even if catch with constant quota is carried out from one age group independently of individual genotypes the type of genetic equilibrium in population can change.
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